IMO, the most pleasant option would be:
bus to MGM, boat to BW (or get off at Swan and walk ove the bridge, a slightly faster option). The boat is a really pleasant way to go anywhere, IMO.
If you are in a part of SSR that is closer to DTD, then hoof it over to DTD and grab the BW bus. Alternatively, just grab any bus to a park and switch to the BW bus from there.
But MGM to the Boat would be the preferred means of arrival at BW, which of course is meant to be viewed from the water.