Our 10 day trip included Memorial Day weekend. We used Tour Guide Mike and our longest wait for any ride was 17 minutes. We were at MK on Saturday, Epcot on Sunday and MGM on Monday. The only day that felt really crowded was Sunday at Epcot. The fast pass return times were quite a bit longer than I anticipated and some of the buildings were really packed. However, we had a touring plan, used Fast Pass, and had reservations for a nice lunch, so we had no problems.