Usually, all resort buses stop at Peninsular Road first, followed by South Point, Old Turtle Pond, Miller Road and then Hospitality House before leaving the resort.
The DD bus usually stops at Hospitality House first and then follows the above schedule (an an internal bus)- again stopping at HH before leaving the resort. At times this bus will go to Miller Road before Peninsular.
In the afternoon, at some times of the year, the Epcot bus will alternate between the first schedule and second.
In all cases HH is normally the final stop before leaving the resort- so getting on any bus will take you to the front desk/pool/Olivia's area. If there is any doubt, just ask the driver- they are always eager to help.
Enjoy!