I'm a newbie to cruising and have a question regarding the Grand Cayman Stingray City Sandbar and Reef Snorkel with Lunch excursion on Rhapsody of the Seas. What do you do with your belongings while you are off the boat and in the water? I'm not real keen on leaving my wallet with credit cards, cash, etc. just sitting there, unsecured, while we are visiting the stingrays and later while we are snorkeling. Is there some sort of locker provided by the tour boat in which to secure your valuables? Also, if anyone has done this excursion, could you please provide specifics about it--what's with the 0.3 mile hike to get to snorkeling reef, and where is lunch? Thanks!