I just returned last night and went to each of the Parks for EMH. Here's the restraurant breakdown. hope it helps.
DINING LOCATIONS:
MK:
Tony's
Cosmic rays
Liberty Tree Tavern
Pecos Bill Cafe
EPCOT:
Cantina de San Angel
Electric Umbrella
San Angel Inn
MGM:
Backlot express
Catalina Eddie's
50s PT Cafe
Rosie's All-Amer. Cafe
Sci-Fi Dine-In
AK:
Rainforest Cafe
Pizzafari
Restaurantosaurus
While at MGM, we ate at 50PT at 6:30 (park closed at 7:00), so when we were done, most non-resort folks were gone. Crowds were moderate to light.
MK will always be crowded no matter what, that's all I can say, not many walk ons
AK was wonderful. We did everything with very little wait to none.
EPCOT was crowded, but we didn't stay long. We stayed until Iluminations then hit the Mexico ride (and so did everyone else--wow).
I really liked the late hours and we got alot of stuff done. Bottom line, take a pair of scissors with you on your checked bags because taking those bands off every night got to be a pain.
AK was the strictest of all parks with managers standing at the entrance of sections (Dinoland) stopping anyone without a band from entering.
Another tip. If you see a long line to get your band, pass it. There are at least 3 locations where you can get "banded" and there are never lines there. We got to MGM and the line had about 30 people in it. We headed to R&R and there was no wait.
There were lots of managers taking surveys during the events, probably so that stores that are open can have their hours tweaked. (the candy store and most other stores were always open when we left each park).