I didn't read all the posts prior.
Personally, I wouldn't go with a baby that young. I was still getting breastfeeding down when mine were that young. And the night waking, etc. I think throwing a Disney trip in there would have sent me over the edge.
Does she have easy pregnancies? If so, may I suggest Feb, March? May would put you in the second trimester, which was my least eventful trimester.
Also, maybe reschedule for March of next year when baby is six months.
I agree with this^
It's a difficult decision you'd be making, because there are many unknowns - you don't know how her pregnancy will go - I realize it's not her first one, but my third pregnancy was my most difficult.
Don't know how labour and delivery will go....what if a c-section is required? Actually, if I had a protracted labour, and big baby, I don't know if I'd want to walk miles everyday at 2 months PP.
You don't know the temperament of the baby, just getting the hang of breastfeeding......one of my kids had reflux until maybe 6 months, and had projectile spit-up after.every.nursing. I certainly wouldn't have wanted to manage that at DW. Another wanted to eat all the time at that age...even though he was BF, I never got the hang of it in the carrier, or on the go.
As someone else mentioned, if baby is overdue, might not even be 8 weeks. I'm not sure of the US vaccination schedule, but I wouldn't be comfortable taking an unvaccinated newborn to DW.
Honestly, I feel like it would also be a lot for you and the rest of the family. You two older kids (who really aren't all that old) won't have much time with m&d because you'll be wrangling a toddler, and your wife will be busy with a new baby. The responsibility of your 18 month old (Plus older two) will be all you.
We took three kids 7, 5, 2.....and my hubby and I were exhausted at the end! My 2 year old kept jumping out of the stroller, wanting to run, or being on someone's shoulders....the older two loved looking at the sites, so we're moving slowly...we had to tag-team quite often!
Even if you plan a 'go with the flow' relaxing trip.....are the three other kids going to want to wait for 30 mins because mom needs to feed and change the baby....again?
I did a family visit with my first baby at around 8 weeks (two 8-hr round trip drives and four flights). I actually asked my dad to travel with me, so I'd have some help. Everything just took so much longer. It went pretty well, but we were visiting family, so it was a little easier to manage breastfeeding on the go, and modifying our schedules. Even on this trip I was very aware of her waking at night, or crying (didn't want to disturb anyone, and family is proabanly a lot more understanding than strangers in an expensive hotel). I was really beat at the end of it though.......
I personally wouldn't plan a trip at that time as there would be too many unknown variables for me. If things are going fabulously, could you do a 'trial' trip somewhere a little less overwhelming?
Congratulations on your pregnancy...and best of luck with whatever decision you make!