Clothing
Weather is something you can never count on, so I would recommend that you have pretty much everything you might need, short of artic survival gear. It can get pretty cold and miserable, even in July, if your wet and some wind is blowing. Add a factor of two to that if it's at night. It is not umcommon in the Gulf, to be sweating your bunns off during the day, and being downright chilly at night.