and excursions that you can purchase through them, but you may have MUCH better luck and a much more personal experience booking tours on your own. There are always people at each stop that do tours for a living and they are often times MUCH better than the ones booked through the boat in a group with 150 other people. Internet reviews and ratings have made these things much safer to do on your own - safer in the idea that you will have a good experience and not get stuck with some amateur operation.