Be careful
As a formerly frequent visitor to the Cayman Islands, I can advise you to BE SURE you have all of your personal and vessel documentation in perfect order. Don't violate ANY of their customs regulations. They can be quick to impound and even confiscate your boat. Don't go ashore until you are cleared by/with the customs/immigration officials. I'm a retired airline employee, and I've visited the Caymans probably 30 times, I have over 150 dives there, all but one from our own inflatable that we kept with a friend down there. The Caymans are famous for their strict rules regarding drugs and immigration. They are very persnickety. Check out everything before you go. Rule #1 in GCM is "Don't do Anything Wrong"!