We recommend Fabian's Taxi Tours. You can find him on line. He charged us $160 for a full island tour, private. Took us many places, bought us a warm loaf of bread, cassava bread, coconut cookies, etc. Knowledgeable, pleasant, reliable. Good car, good driver.http://www.fabiantoursstlucia.com/
We highly recommend Phillip Tours in St.Lucia @www.philliptoursstlucia.com we've toured with both Jackson and Martis, these guys are extremely reliable and provides a great tour.