We went in March 2004. March is spring break for everyone (elementary, junior high, high school, college). It is one of the busiest times at the parks (I believe it may be second only to Christmas). It was awful. We had to stand in line for everything, and by stand in line I mean for 30-90 minutes for each ride. We had everything planned out, ADR's, a list of must do's. We stayed in the parks from early morning until late at night. We did not get to see everything we wanted (and we are not big ride people, no coasters at all). We never got on the buzz lightyear ride at MK, fastpasses were out and the wait was more than an hour. We had to wait for two hours to make sure we had a spot where we could see the spectromagic parade in MK, and we did not even get spots right on the street in front. I do not recommend going in March, unless you have been there many times so the popular attractions are not must do's, or you can't go any other time of the year. The parks are packed and the weather can get fairly warm (upper 80's, well I consider that warm). But if it is the only time of year you can get away, then go, it was still a lot of fun.