DME will ask for your flight information, but you do not arrange for a specific pick up time.
If you are arrivng at 10:00 AM and have put your DME tags on your luggage, you go directly to the DME desk on the B side. You check in and then are directed to a specific bus going to your resort. You may wait for a few minutes to board, you my wait on the bus or you may leave right away.
If you are arriving at 10:00 PM, you will need to collect your luggage and then proceed to the DME desk to board your bus.
Magical Express buses run continuously, so there is no specific time that will be given to you. They use the flight information to help control the number of busses needed for any given time.