I've returned to my resort at about 2am (EMHs) and felt so bad for the folks boarding the DME bus to head back to the airport. I guess it wasn't so bad for them...they could stay at a park and then just head back to the resort for the bus. The really awful times are around 3-4am....unless you are there at a time that MK is open until 2ish, you have nothing to do for several hours...not enough time to really sleep, and no park to go to.