Depending on our school spring break which is either the week before or after easter - we have gone to WDW 3 times and will again in 2007. The crowds are high, but the park (MK) is open from 8:00am to midnight. If you get there at or before 8am - the park is easy to navigate until 10:30 or 11:00 and then you should have a couple of fastpasses which should tide you over for a few more hours. However, from 11:30 - midafternoon - it's packed and then starts to thin out a bit after that. After about 8:00pm-9:00pm, it's pretty manageable again. In fact, we just continuously rode goofy's barnstormer at 9:00pm. At 8:00am we were continuously riding Big Thunder Railroad. You can manage, but you definitely need a general game plan. We like it then (even though the crowds are large) because there are extended hours and more characters out.