There are lockers available on the compound. When you disembark, follow the first trail that turns left. It goes to the waterpark, swimming area, jet ski's and the general check-in area for the excursions. Just past that general area is the pavillion where food will be served and the restrooms.
If instead of turning left you were to continue forward to the opposite side of the peninsula (approximately 200-250 yards); there is a great beach to lay on the sand (the best spots go early) and view (or take a long distance picture of) the zip line riders on their last ride.