In St. Lucia we book an island tour with COSOL Tours. We had a fabulous time. They took us all over the island, they had food, rum and beer from St. Lucia for us to try. It was all very good. Then we got on a catamaran and went to Sugar Beach to snorkel. From their, we went to the Drive In Volcano which was a lot of fun. They definitely know how to show everyone a great time. The cost was $75 per person. Definitely recommend COSOL Tours.
In St. Kitts, we went on an island tour with Thenford Grey Tours. They also showed us a great time. We toured the island, went to a botanical forest, and at the end you could either be dropped off at Shipwreck Beach or back to the boat for shopping. He came and picked us up from the beach and back to the ship. The cost was $55 per person. Great tour also.
In Barbados, we took a taxi around the island to sight see. This was our least favorite island.
Enjoy your cruise.