There are two bus stations here within easy walking distance of the dock, which is downtown (there also is a secondary dock a bit farther out). Ask in town for directions to the bus terminal you want. Eastside buses go across the island to historic Nelsons Dockyard, which we did not visit this time, but which has a nice secluded beach within easy walking distance (I think the name is Pigeon Point, but ask at Nelsons for the nearest beach). We arrived on a local holiday when eastside buses were infrequent, so we took a westside bus for 20 minutes ($1 US) south to Jolly beach, which is a broad travel-poster-beautiful beach lined by attractive low-rise hotels, restaurants, and dive shops. The bus drops one just outside the resorts (this is the transport for the resort workers) and one simply has to ask directions for the public beach access. One walks through several checkpoints, the beach is so secure. There were a few wave-runners, but very few people and the water is that wonderful Caribbean blue over the white sand bottom. Snorkeling is not good at the beach, but the nearby dive shops offer snorkel tours in the early afternoon for about $10-20 US depending on how much of their equipment you need. (I did not take a boat snorkel and cannot specifically recommend it). Again, return minivans to the ship are frequent.