In the morning and in the evenings, you will share a bus with the S/D. Mid-day BWV shares with S/D, YC/BC. But for the busier park openings and closings, it's just those three resorts. YC/BC have their own buses for those times. I have actually taken the YC/BC bus late at night rather than wait for the BW bus...just walked over to BW from BC.