We do this on EVERY trip! It is a highlight for us. When we do the ones on the monorail, we leave MK during the hot part of the day, and hop on the monorail spend the hot part of the afternoon resort hopping. We have lunch at one, and shop in others, stroll along the beaches and take pictures. We also tend to do this when at Epcot, as well. Leave Epcot about one, and go to Boardwalk, have a beer and sandwich at Big River Grille, and shop. On the night that we eat at Cape May Cafe, after we eat we tour the Yacht and Beach Club, and then walk over to Boardwalk. Afterwards, we catch the bus to Downtown Disney, and from there back to our home resort.
If you want to visit the other resorts, the easiest way is by car, though!