If you'd like to check out a bit later, call the front desk the day before you're leaving and ask if you can get late check-out. This often works and it'll give you another 2 hours. The late check-outs we've gotten have been at 1 pm.
DME will leave info on the door of your room the day before you check out. It'll give you your bus schedule. BTW, be on time for the bus pick-up. They run on an exact schedule and if you miss your bus, there may not be a "next one."