Has anyone done the "Ocean walker" and/or helicopter ride with Quicksilver cruises? I do not know how to swim, so I'm kind of hesistant to go snorkeling. Quicksilver does offer a semi-sub, but if possible I would like to be in the water and the Ocean Walker does not require swimming. I also wanted to do the 10 min helicopter ride but do not know if it is worth it. Any advice/information is greatly appreciated.