In the book "The Unofficial Guide to Disney World", the authors rate the crowds each day on a scale of 1-10, with 1 being very light crowds and 10 being jam packed. For the week of April 24th, which sounds like when you're going, the 24th is rated a 5- busy, with crowds affecting major headling attractions- and the rest of the week is rated a 3- light crowded conditions. I always plan my dates around the recommendations in this book, at they are pretty much always right on with the crowds. When we went in December, the crowds we rated a 3 and it was wonderful! The longest we waited for anything was 5 minutes, and we did the Tower of Terror two times in a row just walking right on. We're going back in May, and once again I've planned my dates around crowd levels of 3. Hopefully, they'll be right once again!