As for dinner, I would say our wait staff in the past has been very good with the kiddies. We also seem to loose our above 3yr old kids to the buffet with the rest of the kids club for most dinners. Dylan, who will be about 21 months when we sail does get very antsy at dinner after a bit. My hopes are all will work out and between us and the waitstaff Dylan may just enjoy sitting there for the whole meal! I suspect the girls will likely want to eat with the club kids again.
As for costumes, I do have a Davy Jones costume I wore for Halloween this past year, but I dont think I am going to take it on the cruise. I am not sure anyone else in our party will dress up.