Hi. We're going to Sandals Grande in about 1 1/2 weeks (can't wait) and are willing to do a couple of day excursions. Any advice for something amazing? We're all pretty adventurous so are open to doing a lot - hiking, snorkeling, zip lining, shopping, etc. This will be our first trip to St. Lucia and we just don't want to miss anything incredible. Thank you in advance.