Has anyone done the 3 Island Snorkel and Beach Adventure in Nassau? I have been to Nassau a couple times and am fine with just staying on the ship, but my 15 year old son likes the sound of visiting "Gilligan's Island". It seems some of these excursions take up a lot of time just waiting for it to start and in the transportation. I can't seem to find any reviews of it online. Any help would be appreciated!