This might be Disney heresy but if I didn't have a car, I'd bypass DTD. Most of the merchandise can be found in the parks or resorts. There are plenty of restaurants to patronize without venturing over there. The stoplights alone in the area guarantee a long ride unless the buses only go the back route (and it doesn't sound like they do...perhaps they can't). My time in WDW is too short to wait for infrequent buses with multiple resort stops as well as multiple stops in DTD itself.