Double check when you get there but I think...
Park busses in your "village" will bring you to the main building.
DTD busses will bring you from the main building to your "village".
That's the way it was when I stayed there, but double check, just to make sure.
Also, the golf carts - be wary of them. They practically ran my nieces over and went ZOOMING all over the place. My mother had both her knees replaced before our trip and was able to walk well enough. Not one of those golf carts ever stopped to offer to help her. When asked, they said they were only for the people staying there for whatever convention was going on.