Gosh, thanks so much for all the great advice. I am going to look into getting three staterooms even though that is going to crank up the cost quite a bit again. We were able to get the 10% rebook on board discount for the two staterooms, so the third room will have to be at the going rack rate. Will look in to it, though. That way, if something happens that prevents DSD from traveling from the UK, we just cancel her cabin.
Yes, it's my husband who is being asked by his daughter to fly over to the UK and escort her both ways. And I have to laugh along with one other poster who questioned how useful her own husband would be as a new granddad in a similar situation. I love my DH to death, but I doubt he'd have a clue what to do with the baby other than to hold her while his daughter uses the loo!
My DD21 is a college student and DS18 is in high school, so there's no expectation they would foot their own bill for this trip. DSD works but could not afford a
Disney Cruise or a trip to the US on her own, so we wanted to treat the whole family to this vacation. We hadn't budgeted for the extra expense of the baby, but will wrangle through that issue best we can.
I am encouraged by the availability of a diaper genie, and we'll just go ahead and get a US car seat and bring it along so there's no safety issues with the UK one fitting US cars. Thanks, also, for the good advice about requesting a baby bassinet on the plane, and the necessity to put the baby's passport application in motion as soon as she's born. Don't know yet how the baby's father is going to play into this or if he'll give any type of resistance over the baby leaving the country. Wonder if insurance covers THAT! There are so many more pieces to this troubled story I won't attempt to go into here.
It's disturbing how much I've forgotten about what a five month old baby is like, but I do recall from traveling with my own two kids on planes that it was way easier before they got to the climb-around-the-seats stage!
As far as the Small World child care goes, I think the only time we'd attempt to use it would be so we could do the one Palo dinner. I'm sure by the time this trip rolls around, my stepdaughter will need no additional reminders of how many things she is no longer going to be able to do because she's now a parent. If the timing works out, we'd certainly like her to be able to participate in the Palo meal.
I appreciate all your compassion and great suggestions.