Here's an option we've tried. Since we know we love St Martin we've done several trips where we try out another island for 4 or 5 days and then fly to St Martin to end our vacation. Once we flew into St Martin, took a boat over to Anguilla for 4 days, took the boat back to St Martin for a week. Another time we flew to Aruba, stayed there 5 days, flew to St Martin for the rest of our vacation time. My favorite one, though, was flying to St Martin, changing planes and flying to Nevis, staying there 5 days, then flying back to St Martin for the remainder of our time. We love St Martin but this gives us a taste of someplace else too.