How about a rowing race on the lake using SCT's as the canoes and the hand controllers as paddles!
They do float don't they? And their mounts as anchors!!
I'll give my boys some spray cans to walk around the camp to spray paint a new clolour on your OTA's. You know, brighten them up a bit!
Another great idea is a portable welder. We can weld tripod legs in the open position so they won't move around or close up while your taking those critical Astrophotos. Can't beat a very rigid mount!