If you can tip $17,000, this is the island for you BY DAVE BARRY If you're looking to visit a Caribbean island that you cannot possibly afford, I highly recommend St. Barthélemy. St. Barthélemy -- more commonly called ''St. Barts,'' or ''St. Barth,'' or ''The Land of Naked French People'' -- is a tiny exclusive island located in the Caribbean island chain known as the Lesser Antilles, which also includes Anguilla, Antigua, Begonia, Barbuda, Saba, Simba, Bomba, Rhumba, Gazebo, Madagascar, St. Kitts and the Dave Clark Five. (I may be making some of these islands up; there is no way...