Our trips have both been during my kids' fall break from school... but I don't see any problem with pulling your kids out for a family vacation. In fact, I'd love for my family to go to WDW sometime during November or December (so we can see all the holiday decorations) and if we do this, then I'd have to take my kids out of school.
Fingers crossed you can get the flights you need!
Fingers crossed you can get the flights you need!