Having been at AK during evening "EMH", I have to say that it is a total waste of time. Say the park closes at 10PM and EMH goes to midnight. Well, maybe they have a late Rivers of Light show, but otherwise only Pandora is open. If the wait for FOP at 10 is 2 hours (and most nights it is), that wait won't come down at all during EMH because the queue is full of people who were in line prior to park close. So the one area is mobbed, the lines for both rides are ridiculous and there is nothing else to do. We choose to do a morning EMH instead as once we got off of FOP at 8:20 (we were at the park shortly after 7) we could take a safari ride, walk the trails and ride Everest all before 9, a much better 1 hour value then the standing in line time for night time EMH.