To be honest, if I had ever that thought going to Disney World or taking a
Disney cruise was of more educational value than sending our son to school, I'd have found another school.
The only time we ever took him out for more than a half day, was the one year we had so many snow days that they had to add almost two weeks to the school calendar. We had already booked and paid for (nonrefundable) a rental house at the beach. If they hadn't been forced to add so many days, school would have been over by several days before we left. He was in the 6th grade and wasn't they only child in that situation. He had probably 4 or 5 in his class alone. The school was prepared for it and were very accommodating. Even so, the last week or two that he was in school was seriously crammed with extra work / tests / stress. He basically said, never again. And we never did.
Once he got into Jr High and High School his various band / team activities not only kept us from traveling during the school year, but often dictated when we could go in the Summer. I never looked at it as a hardship, just a good life lesson for our son about living up to his responsibilities, even if it was inconvenient at times.
Flame away!