Obese chick at a water park, please help?

Does anyone know if wet n wild at universal studios in Orlando requires bathing suits only? Some water parks don't let you wear a tshirt and shorts. If not, what can I do to help cover up my fat? I can't really afford a wetsuit. I really don't know what to do. I'm going on a class trip with a bunch of my friends. I havent worn a bathing suit in public in so many years. It's causing an incredible amount of anxiety and i'm really worried. I have a one piece bathing suit with a little skirt on it, or maybe I'll wear spankies as bottoms. I need help. :(