Some of the excursions say that you can find transportation back to the ship on your own if you choose to stay longer. We are heading out to Nassua, St. Thomas and St. Martin, and were wondering if it is safe to do this and do they try to rip you off on transportation costs back to the ship. Some of the excursions look wonderful but just don't seem long enough. Any help would be greatly appreciated. We are looking for more info for St. Thomas and St. Martin as I don't believe we will be in Nassua long enough to do any long exploring.