Hilton Orlando LBV and Hilton Buena Vista Palace are on the two corners closest to DS.
BVP you walk to corner and cross one pedestrian bridge.
HO you walk to corner and cross two pedestrian bridges (connected).
BVP is a tall tower (unless in Island building then much closer) and HO is a long footprint.
Most think HO is closest BUT if you don't get a room close to DS it can still be a long walk. If you decide there I would request a room closest to the pedestrian bridge.