Oh fun! One of the "should my kids skip a few days of school" threads! Yay!
Here's the deal: Some folk immediately get on their soapbox and insist if you take your child out of school for
any days it will immediately start a downwards spiral of irresponsibility that eventually leads to bad grades, gang membership, and probably tattoos and piercings. They cite as proof: "personal opinion/nothing".
Some other folk don't see the problem with taking their kids out for 2 (or more) weeks. They... well in the end, they just don't care, really.
MOST folk are likely going to fall somewhere in the middle. Especially in Elementary School, missing a couple of days isn't going to lead to your kids not understanding differential equations.
My two cents:
If for whatever reason (financial, work related, other), this is the best time to take your vacation, go for it.
If this is a "once in a lifetime" (as in you prob won't be doing it again for several years if ever again) kind of trip, go for it.
If it's for a longish period of time (say 5 days of missed school) either talk to the teachers on what material they'll be covering and try to cover it while you're on vacation, or just take some books for them to read at night and maybe a math workbook for them to do while they're in Disney. Spending time with the WHOLE family is as important as learning to be responsible. Lifelong memories and all that. I just probably wouldn't make it a yearly habit.
If it's more than 5 days, I'd probably not add the 2 days.
If it's just 2 days they're missing, and your kids are in Elementary, then seriously I really don't think you'll need to worry about your kids somehow thinking school is not important (they go the rest of the year), or go into a downwards spiral and end up joining the neighborhood tricycle bike gang.