I’m doing similar in a few weeks for a family member’s wedding, but the difference is I don’t drink so won’t be hungover. Can you stay the second night at his parents so you only drive half way back?

Genuinely, what are you getting from this relationship? How does it benefit you?

Sorry OP but he is showing his true colours. He doesn't give a shit about you and your child. A 600 mile round trip with a baby over two days. You won't be able to have a good night out as you'll be knackered from driving, and stressing about doing the return trip. The baby will need multiple stops. You don't even know how the baby will cope in the car for that amount of time. Some of them fucking hate it and just cry. And now he is guilting you for asking for a compromise. Fuck him.

Oh and stop offering alternatives. You aren't his mum and you don't owe him anything.

He either grows up or you will eventually shove him out of the door. Sadly that seems to be the predicament you are in.

300 miles is 6hrs driving essentially each way if friend lives 300 miles away. Your partner is an idiot and easy for them to guilt trip you because they can't share that drive with you. It's really tiring with experience but even more if new when you haven't driven over 30 mins. You will be driving over a lot of unfamiliar types of roads.
For safety sake tell him to go stuff himself as refusing to pay for train means he is stopping parents seeing kid. Alternatively you can take train and baby and he csn drive himself there.... Oh wait he has to pass driving test first. Don't take this extra on for yourself, take care of yourself in this instance.

This guy sounds like a right chancer, but anyway….
300 miles is a long journey. To do it, have a night out and then come home does not sound great, especially with the tiredness that comes with have a baby - The fact that you can’t even share the drive on the way home sounds really dangerous imo. The advert “Tiredness kills” is a very valid one.

Christ, he sounds awful. He's massively taking the piss out of you.

Also wtf is this all about? "he booked hotel (I’m on statutory pay on maternity leave and can’t afford it)"

Why isn't he sharing his earnings with you more fairly, to support you and his child while you're on mat leave? At least, I'm assuming it's his child?

Drop the rope OP, you’ve made it clear that you’re not doing it and it’s up to him to work out the logistics for him getting there, his parents seeing the baby etc. It’s his problem to fix, not yours.

Nothing wrong in my opinion with him not driving.

Wrong to expect anyone to go 300 miles one day and come back the next, unless for say a funeral.

No. It's just too far in that space of time. If you'd had an extra night it might have been doable.
I drive that distance perhaps 3 or 4 times a year and stay overnight and come back - but I'm a) not a new driver b) don't have a baby in tow c) and in bed early on the overnight as it's not a trip involving a big night out.
When I drive that distance I break it into two sections of 2 - 2.5 hours each and have a long break in the middle including a meal and then a nap on the back seat of the car. I can't imagine how awful it would be to have to drive that far with a baby who has lots of needs and there will need to be extra stops for the baby or the baby starts crying.

He is a selfish prick. He has other options a) he pays for an extra night b) he pays for the train for you all c) he pays for the train for himself and goes by himself. If he doesn't like any of those options then he needs to stay at home and plan better next time.
It's ludicrous to expect a new driver and a new mum to drive 600 miles in 24 hours on motorways when they've only ever driven 30 miles on a motorway before. It's a different kettle of fish and it's dangerous.

I have driven trucks for 6 years before my son was born. Even for me that would not be a reasonable expectation! Especially with baby in the car. Don't do it! Have you found out if baby is carsick yet? I've found that the vibrations of the car set my daughter off! She hated the tumble drier too.

I had done it once when I was young. Being stupid and didn't understand the effort and concentration invovled. It's in NZ and it took me over 8 hours to drive from Auckland to Wellington. (Google told me it's about 300 miles). I stayed one one day for the event and then drove back on the third day. Never again. I now always book a stop to drive around only 4 hours a day.

What a selfish twat just say no OP it's far too much I drove to a wedding similar distance and a was 8 months pregnant as DH didn't drive I should have said no x

Christ that’s far too far to drive for just one night, even without the baby, the big night out and the fact you are a new driver. I wouldn’t be doing that.

I think the best thing now is for you to drop out completely and let him go on his own.

What does he think you are, some kind of chauffeur?

We have somewhere re regularly go on holiday that’s 250 miles and I find that three nights is the absolute minimum to make it worth it. And only done that once.

He doesn’t care about how this affects you and the baby, he just wants you to facilitate his night out.
Learn to say no, that doesn’t work for me.

A 600 mile journey over 2 days would be at least two full tanks of fuel. In my diesel it’d be about £150. So that’s the sort of expense he was expecting you to stump up for never mind the stress of the driving.

He’s thrown his toys out of the pram now and is saying he won’t go in the hope of manipulating you to back down. DO NOT back down.

He sounds like an immature knob.

Of course YANBU. I'm an experienced driver and regularly do a 150 mile trip to visit parents which takes about 3 hours including stop. But I wouldn't dream of doing double that a) if I was a new driver b) when I've been up late drinking the night before and c) with a young baby. Crazy idea. I'd tell him to fuck off (preferably forever but I know it's never that easy).

Say no. You don't feel up to it and you'd be putting yourself, your passengers, your baby and other road users at risk until you've built up your confidence. Don't apologise - he should have asked you before organising.

But this feels very much like a symptom of the problem (your relationship and his lazy entitlement) rather than the problem itself.

I'm sorry that you are feeling under such pressure OP.
Like a lot of people have said - I would drive 300 miles somewhere and stay overnight or I have done that, climbed a mountain and driven home afterwards. But I've been driving over 20 years, I'm used to motorways and the extra hazard perception you need, will stop frequently to stretch my legs ... oh and I would never do it with a baby in tow or try to go out and drink. Then I'd collapse afterwards and sleep because the concentration takes it out of you.

I remember a drive of 11 miles where we had to pull over because the baby was crying so desperately and I wasn't even driving. It is so stressful. On the motorway you will feel the urge to carry on if your baby is asleep and push past services ... then they will wake up and need you just when you've hit traffic with no services for miles.

Do your partner's parents drive? If they do I'd have thought they would have heard his plan and pointed out that it's expecting an awful lot of any driver, let alone a new one with a baby.

I'd be sending him on a train on his own. This is not worth the risk and worry. The grandparents can see your baby some other time when there's less stress involved and you can get a bit of a rest.

I personally would suck it up and do it - but I wouldn't expect someone else to unless they had communicated clearly that they were happy to.

Does your DP get up in the night with the baby? Has he offered to do the nights for a couple of days before you go and then after you get back so you are doing the drive well rested, and can recover?

Im guessing not.

He’s completely inconsiderate and is using emotional blackmail to try and make you concede and take this risk. What an absolute twat, sorry.

You stay home with the baby and he can sort out his travel there and back. Cheeky twat he is. Don't back down OP and don't feel guilty.

He’s now saying he won’t go at all, refusing to get the train. I’ve tried to offer alternatives but he’s refusing.
i was supposed to pay for fuel too

If he refuses to go, that's his decision. Just say "okay, whatever you decide, no problem!" with a smile and go about your day.

As for you paying for fuel?! Don't make me laugh!!

I think he sounds like a total wanker.