We are heading back to Hawaii on the Carnival Spirit next year. Did you take their Kauai tour? The more searching i have done, the more i realized how hard it is to find tours that work with our ships itinerary, so i went back to Hawaii Cruise Excursions and they have tours to match our port times. I have booked our Kauai tour with them and a helicopter doors off for the volcanoes and im looking at a snorkeling tour they have in Kona. From all my searching, this seems to be the best site ive found for our tours.