Sorry to say, the crowds are not value season crowds. The crowds will not be Christmas/Easter/Summertime crowds, but you will have waits. You will need those ADRs and fastpasses. This is the 13th late April/early May in a row for us and the crowds are never light. The weekdays are good, but the weekends are tough. We rarely even visit a park on Saturdays anymore, except maybe just to eat or first thing in the morning. In addition to all of us sun deprived visitors, you have the locals who enjoy the great weather before it gets bad--also love to visit EPCOT for the concerts, plus the locals like to visit with their seasonal passes before they start their black out period, there are usually lots of kids down for school trips/music days and sporting events, lots of conventions this time of year too. However, with all of this in mind, I would never change my plans to visit, because of all the trips we take throughout the year, this time of year is my favorite. We will be there April 23-May 5th @ BWV. My only tip is, if you want to enjoy a quiet time, try to get to the parks early and if you visit a water park, you must be there early to get a chair.