May is a great time to go. The crowds are not bad. On our trip in May 05, we were able to walk on to some of the most popular rides such as RNR, Splash MT, Space Mt, and MS. The crowds did up on the weekends and the weather was great, we only had rain one evening. From experience it seems that the closer you go to Memorial Day, the busier it will be. We really like going in May and our going back again in May 2006. Have fun planning your trip!