Well, we were there this past year, and while we didn't spend midnight in a park (we went to California Grill, which was a great event), we did go to MGM that morning for EE. We wanted to be there at EE opening to get all the big rides out of the way before the crowds, but due to some sort of bus problem at AKL, we actually got there around regular park opening (which was 8am). It wasn't a huge problem though as ToT and RnRC didn't really have any waits. I guess all the EE people did them between 7 and 8 so when we got there around 7:50 they were practically empty. We got RnRC fastpasses, rode ToT, then rode RnRC without the fastpasses, then went to ST, and back to RnRC for the fastpass time. CMs were handing out fastpasses to various attractions on the main street when you enter, between all the shops, and also in our character breakfast at H&V. It was crowded, but really not so bad like I had thought, even at midday. I think most of the huge crowds go to MK on NYE, since we saw their parking lot was full when we left MGM (around 3pm). They had a stage set up in front of the Sorcerer's Hat where they had entertainment and they were passing out hats and horns to guests as we left. Sorry I don't know what it was like at midnight, but hope that helps a little! Have a great trip!