well, firstly a good mood and some of that adventure enthusiasm. Other than that it would be useful to have the basis when you go to the beach, such as swimsuit, beach towel, hat, sunscreen, and water in a reusable bottle. additionally, it is important to have a t-shirt with you (preferable of Lycra fabric) since we will all be wearing a life-jacket, but also wet shoes(or flip flops) as we will always come across some rocky terrain!