I would be very tempted to just have a cab called. It's not that far to POP from S/D, and the fare shouldn't be all that much. I hate having to go to MGM, then wait for a resort bus. 20 minutes to get to MGM (if still open), then a possible wait of 15+ mins for your resort bus, then a bus ride. POP is only about 8 mins away by direct route. But, if you don't want to use a cab, or if MGM is closed, then your only alternative is to take the S/D bus to DTD and transfer there....also time consuming.