Dave- Sorry to pick on you twice in a day but wanted to ask about capt Marvi's. Last time we cruised we missed Grand Caymen due to a sick passenger. If I book a private tour how do I go about canceling if the cruise ship doesn'get to port or weather is bad? Is there a deposit up front that I would lose? I have heard that Capt Marvin's is the way to go because of less crowds etc.