Check out this article on Essential Travel Items for Mexico for a full list of things you will want to have with you.
Essential Travel Items
When traveling to this small gated community it is wise to bring your golf clubs if you don't fancy rental clubs. When heading out on a tour or fishing charter be sure to bring sunscreen and a hat. It's easy to get overheated and sunburnt on the ocean when caught up in the world class fishing. Most fishing charters have all the gear you need and provide water or drinks for hydration. Usually you just need to pack some snacks and a windproof/water resistant coat.