We were there arriving the Wed before Memorial Day and left the Friday after. Thursday and Friday before was fairly empty, even at Friday's Star Wars Weekend and we were in Magic Kingdom for the 24 Hour event. From Sunday of the weekend on we felt like it was very crowded. We used to go this time often about 7-8 years ago and never had it like this. It was hot, crowded, very long lines and people were very rude. The safari fastpass line had to be queued in a zig zag outside the normal line. The monorail entrance to MK had a huge temporary queue built. So many fastpass lines were so far out the normal they had CM's standing there with flags. (picture below is end of Buzz Lightyear fastpass return line where green flag is). We will never return that week. That said, we travel there in January, September, March, mid December .... times that are traditionally lower crowd times .... so this crowd level was not acceptable for us. Everybody is different. On the plus side the economy was doing well in Disney World.