We used Island Charters for the six hour private tour on the smaller boat with just four adults. Our Captain and guide for the day was Mark. First off, he was awesome all throughout the day. You can tell he loves his job, loves meeting people, but more importantly loves the Grand Cayman sting rays. He was excited as us to be in the water with them. Second the stops were great. We met at Camana Bay, went to Sting Ray City, then a snorkel spot, then Starfish Point, then Kiabo for supper on the beach and to the Bioluminescent Bay last. The sting rays were beautiful and unique and they were every where. Probably 25 immediately flocked to us, and we were about to hold and feed them. The coolest thing to me personally though was the Bioluminescent Bay. I have never seen anything quite like that. It felt and looked like magic or that we were in the Avatar movies. The boat was comfortable with dry space storage, a cooler full of water and ice and we brought a few beers and seltzers to add to it. We have been to a lot of islands and done about seven or eight boat days, and if you love marine life, this has been the top one. Highly recommended by all four of us.