We did kind of the same thing last week, arrived on 8/20, we were at the resort by 6:00, checked in, got our room keys, had dinner at The Turf Club at 7:00, ate and went to MK, we had to show our room keys in order to get on the rides for EMH, the park was open until 3:00am!! we had a blast, got to the room around 3:20am!! My 10 year old hung in pretty good, but then slept until noon the next day!