We went to a UK wedding a 2 hour drive away last week with our 22 month old and our 3 week old. DD was due almost 5 weeks before the wedding but was overdue, so very similar timings.
The new baby was no trouble at the wedding, she either fed or slept. The toddler was hard work, DH was up almost continuously exploring the hotel with him. Would you get any help during the wedding?
We all shared a room, and while it wasn't as bad as it could have been, my toddler was woken up by the new born a couple of times. Would all 3 of you be sharing a room? What if your new baby is colicky?
The drive there was fine but the 2 hour home was not, DD decided she wanted 2 half hour feeds during it, so we had to stop twice and keep our toddler entertained while she fed.... Other than the flight, what would the rest of the trip involve? How good are your twins at sitting and waiting?Overall we had a lovely time, but it certainly wasn't relaxing.
I've asked DH and we would give going abroad for a wedding in the next couple of weeks a go, but it would be seriously hard work. We went abroad for a wedding when our toddler was 10 weeks old so have some idea of what would be involved.
However, there is no way we'd have booked anything non refundable in advance of the baby being born. There are just too many unknowns, and too high a risk you'd have to cancel. I know it'll make the flights more expensive, but can you delay making a decision?