BBQ, campfire, put the SB banner up UW during the day to recruit more members as well as by our main area to hang out of course. There are always kids to run around after, tubing down the river (beer included at your own risk). Seeing how shallow it is i see no reason (except getting cold) to avoid doing a shallow river drift to take up some time after the dives - we didnt see the bottom much beyond the ballroom run, most of us just inflated and drifted on the surface chatting. You wanna bring some games, anything from boules to twister (something with no small easily losable playing pieces), could take that volleyball net or a game of softball in that large field up by the entrance (trying not to be too energetic here) and of course just BS-ing the afternoon/evening away