One more thing to consider. Even if you do go on your own, once you get there the other group tours will be there as well, so not quite sure of the benefit of going on your own. Generally, I like booking my own excursions, but in this case I agree with the majority here. Too much of a chance of being left at the dock if something goes wrong.
April 1, 2006 - Serenade of the Seas - 7 days to the Southern Caribbean
October 8, 1984 - NCL Sunward II - 3 day cruise to the Bahamas