St. Thoms - you can do on your own very easily. SO much depends upon what you want to do. IF you just want to hit the beach and do some snorkeling. then get over to St. John Island - do some homework on www.vinow.com
. Shopping is very good on St. Thomas.
St.Maarten - Golden Eagle Catamaran Sail - total blast.- you sail up the coast-gorgeous - over to Tintamar Island preserve where you can swim, snorkel, lay on the beach, go for a walk- food & drink provided.