I just tried to make an online reservation for a 1/2 day pure snorkeling group trip. There aren't any rates posted and the only way to make an online reservation is to provide credit card information. Can anyone tell me what the rates are? I just can't blindly give out credit card information without knowing rates or cancellation penalties. Also, at this time of year, is it generally acceptable to wait until we get on the island before making reservations? Thanks!