Mike, we are leaving tomorrow morning on the Ocean Princess. We are also doing some snorkelling and went to a diving shop and purchased a watertight small flat waist pack for passport, money, credit cards etc. We did not think it would be a good idea to leave that stuff on the beach. Still have not really figured out what to do with the camera. I hope that you get some more answers to your question today, so that I get a chance to read them also. Enjoy.