Extremely crowded! We were there for the first 2 weeks of May and did this a couple of times. While at EPCOT, you still needed to use fastpasses to ride pretty much most of the big rides (Soarin' and Testtrack). We didn't do illuminations and went to the land. We were able to walk on Soarin' at 9:00PM, but 10:00PM the wait was 60 minutes. We got fastpasses at 9:00PM, so was able to do it twice. Same for TT. MK was also extremely crowded, but there are more activities, so the waits were doable. The only quiet park I have found so far is AK, but the Safari line was still very long, as was Dinosaur.