I have to agree with the "stay away from Spring Break" sentiment. My 20 yr old daughter, who has been to DisneyWorld at least 30 times, just went this year at spring break and said it was AWFUL. And she knows every in and out of the parks and rides.

October or early January is MUCH preferred. Those park capacity calendars at www.easywdw.com are pretty accurate.

The best advice is to get there before the parks open so you can be at rope drop. Saturdays seem to be a good day to accomplish a lot early, especially at the Magic Kingdom. GO WITH A PLAN of what you 'must see' and prioritize accordingly. Also, take advantage of the very late night hours, especially the last half hour, when the lines really thin out.

If your kids can miss school without it being a nightmare when they return, I would definitely plan the trip at a less busy time.

Have fun!