Fort Wilderness is kind of unique...
It's quite a large complex, and internal busses run through every 10 minutes on a fixed schedule.
FW has direct busses to Downtown Disney, Disney's Animal Kingdom, and Epcot from the Outpost Depot. There's also a direct bus to the Studios at the Settlement Depot. To get to the MK, you can take the boat, or head over to the TTC and take the Monorail.