We've gone in March 3 times in the last 4 years. We've gone the first, second and thrid week, but never the last week. Last year we were there the thrid week of March, which ended up being very close to Easter and I was afriad it was gonna be horrible, but it wasn't bad until the Sunday before Easter (which was March 22 or 23) The crowds were heavy (my Space Mountain Fanatic of a son waited in line for 70 minutes). Fortunately we left the next day! Since Easter is late this year, I don't imagine the crowds will be all that bad.