We booked a trip to Australia when I was pg with dc1 which fell when he was 5.5m. We are also experienced travellers and were keen to continue.
And then along came DS. I'd read books, been on mumsnet, thought I was prepared. He bf well but often. Rarely off for more than an hour, day or night. He woke every 45 mins for 5m. I was a walking zombie. I had less than 4 hours sleep in 24 hours for months. And sleep when the baby sleeps? Not my DS, who screamed every time he was put down.
So the "holiday". Planned with military precision. Researched all the things I'd need to take. Panicked about my exhaustion levels and 24 hours on a plane with a screaming baby.
Do you know, seems he's a born traveller. Little rogue got loads of compliments for being a good baby. Basically bf the whole trip, slept on my knee, loved the engine sound and had no bother with his ears. We had a good trip.
One thing you can't imagine now though is a holiday will never be the same again. It'll never be head space time, or relaxing on the beach. It's the same stuff (feed, change, get to sleep, soothe, deal with teething, illness, reflux) in a different location, without the backup of family, the nhs and familiar coping strategies. If you have an easy going baby, who is happy out in a buggy in the pub for dinner, sleeps enough for you to feel human, eats well, doesn't have colic and can be put down, then you'll have that baby abroad too and it'll be great. If you have a higher needs baby, it'll be just as hard as at home if not harder.
So, wait and see? Yes I would. I dreaded the trip which took the shine off it.
Go at 4-5m rather than nearer 6. It's much harder to start weaning abroad. If you ebf then feeding is easy.
Yes you have to take a phenomenal amount of stuff, but airlines usually give allowance for buggy/cot/car seat.
Plan your trip to be as easy as possible - somewhere with kitchen facilities, or somewhere they'll bring decent food to your room in case you can't get out. Somewhere with restaurants within walking distance in case you can. Stay away from multi centre and just go to one place for the duration.
No immunisations or antimalarials for under 1s so I'd strongly recommend keeping to countries with better hygiene, no malaria, good healthcare. Also sunscreen not recommended under 6m so beach holiday can be tricky (look for resorts with good amounts of shade)
I know this is long but I wanted to give you the perspective of widely travelled parents with a high needs baby. Having said all that though we have 2 dc now and still travel, but not independently for the time being. All inclusive or self catering for a couple more years, which is not what I or DH would choose, but it works for us as a family.