Best tour guide ever is Thenford Grey. He has probably hundreds of great reviews. If you don't happen to get him personally, no worries--he runs the family business and everyone is great. http://www.thenfordgreytours.com/  He has several different excursions to choose from. We did the Grand Tour of St. Kitts.  My review, as well as @accio7's (who just took that tour last week) can be seen on this site here https://www.royalcaribbeanblog.com/boards/index.php?/search/&q=thenford