Well you are in luck. The Swan is the first stop going back from DTD. However, be aware that there are two stops at DTD, the second one often serves as a shift change location for drivers sometimes resulting in delays as the new driver goes through their checklist and adjustments, and if Typhoon Lagoon is open, the bus will probably stop there first.
He could also end up waiting around 20-30 minutes for a bus to arrive.