Nighttime - did you keep putting a nappy on at night from day 1 or did you try nappy-free nights at first and then go back to nappies if that didn't work?
Night dryness isn’t a learned skill like daytime dryness, so personally I’d keep the nappy on for nighttime’s initially, although we switched to pull ups so they still seemed more like pants to DS. In his case, he still became dry at night within about 6 months of potty training, so we got rid of them then and now just have a waterproof sheet on his mattress as a back up (it’s never been needed).
Naptime - DD still naps for 1-2 hours a day. Did you put a nappy on for naptime when you were first potty training?
Initially we did. We just explained that he might need to wee when he was sleeping and wouldn’t be aware of it, so the pull up was to make sure we caught it if he did. However, we always asked him to use the toilet pre nap and were quick to remove the pull up once he woke up, as I found this was the time he was most vulnerable to using it. After a few weeks, we stopped using them altogether and just left him in pants.
Out and about - we're thinking to just hold her over the loo when she needs to go when we're out. Is this a terrible idea / do we need a travel potty?
We never had a travel potty, but we did (and still do) have a toilet seat cover which we bought for around £10 on Amazon. Best thing we ever bought, as there’s no way DS would have used the toilet with us holding him over it. We also limited where we took him initially to places where we could guarantee a toilet would be easily accessible at short notice and built up from there.
I know the done thing these days seems to be to have them half naked at first but it's Dec and we're not millionaires so I'm hoping clothes on is ok.
We never did no clothes, but we did limit to pants only on his bottom half, and as he became more reliable progressed to pants and shorts, then pants and joggers, etc. This was over the course of about a week. I think if we’d done full clothes from day 1 it would definitely have been confusing for him, as all the textures can end up feeling quite similar to a nappy. Though saying that, nurseries will generally require them to be fully clothed all day even when they’re still training, so it’s obviously possible.
Other tips
Kids can be stubborn, so don’t let the first couple of days dishearten you if there are lots of accidents, and/or you sense stubbornness and reluctance to use the toilet, which is purely based on preference. You have to remember that the change you’re asking them to make is more inconvenient for them than what they’ve been doing up to now, so resistance is to be expected. However, if they show signs of distress or still not understanding what’s expected of them after the first couple of days, be prepared to calmly give up and come back to it in another few weeks/months.
Also, look at getting a book you can read with them in advance, so they understand what’s to come. Maybe practice with a doll; we bought one for DS which came with a potty, etc.
Good luck!