We have gone from WL to Beaches and Cream several times. The way we always go, is from WL to MGM and take the boat from MGM to YC/BC. As mentioned the walk from the monorail or bus stop at EPCOT to Beaches and Cream is a very long walk.
There is no bus from TTC to YC/BC. The only resorts serviced from TTC would be WL and FW.