YC and BC are essentially 'wings' off a central building, so no problems there. It's all one big complex.
YC, BC, BWI/BWV and Swan/Dolphin are all built around Crescent Lake, and there's a walking path around the lake that connects all of the resorts. If you walk out the back door of YC/BC, you'll be able to clearly see all of the resorts. It's about a 5-10 minute walk from BC to the BW area, depending on whether you're trying to get to the BW restaurants, or the BW lobby.
If you'd rather not walk, there's boat service that connects all of the Crescent Lake resorts, Epcot, and DHS.