You can walk down the sidewalk to the pedestrian bridge structure at Hotel Plaza and East Buena Vista. After crossing into Disney Springs (you don’t have to go through the security check point) bear hard right, along the north edge of DS, Cross the bridge, take a left then your first right onto the path that ends at the CS parking lot. On the far side of the lot is the Congress Park bus stop.
Only caveat: that is the next-to-last SSR bus stop. Busses can arrive there (or perhaps bypass there, not sure) quite full.