If you stay at Wilderness Fort, there is no bus to the MK. You must use a boat and even if you have a fear of the water, they won't send a bus for you. Walking is one to two miles.
If you stay at a monorail resort, there is no bus to Epcot. You must use the monorail and even if you have a fear of heights, they won't send a bus for you. Walking is not an option.
If you stay at a Crescent Lake resort (Y&B, BW, Swolphin), there is no bus to Epcot or DHS, you must use the Ferry, and even if you have a fear of the water, they won't send a bus for you. Or, walk (which can be close to a mile).