I called WOS and was told this: buses run from MGM to WOS often, from 8am up until 8pm (I think) . They also run a bus to DTD.
This is one of the reasons we chose to stay at the Dolphin. We are going for cheerleading (yes, my step-daughters will be the DREADED cheerleaders staying at ALL-Stars in Feb.), and the convenience to MGM to get the bus made sense. DH was afraid to be to far away and possibly miss something. Knowing him we'll be up early and ready to go, and he'll be worrying that we'll miss a bus and INSIST we take the taxi!!
Taxi from Dolphin to WOS approx $15 one way.