Has anyone ever done either of the following Eastern Caribbean excursions, the Tiki Hut Snorkel in St Maarten or the Coral World Marine Park in St Thomas? We are going on the January 19 Eastern Caribbean cruise with our DDs, 10 and 7. Neither have snorkled before, but they both want to try and they can both swim. I think they will like the marine life at Coral World, but I am just trying to find out if ir is really nice, or just an over-hyped tourist trap! Also, for Coral World, would it be better to sign up for the Disney Excursion, or book directly with the park on-line. Thanks!