Why not get the car rental, pre check in the resortl online the day before, then drive right to the park, if you really want to be there fast. You can get the room keys after you get to the resort later that night. Otherwise, night sure you will really have that much time getting from the parking, tram, the monorail in, ticket line security, then finally in. You can pick the tickets up at the will call window if you don't already have them. I think they till do that. But, it's not likely you would make any kind of rope drop the next morning.