That's a tough one........kids will see it or find it in a camp setting me thinks. Especially the showering part. Not to be a killjoy, I believe it could be done (keeping your sidearms presence a 'secret') as well. I would at least have a lock box in the car for it if nothing else. It would require careful planning and perhaps a purchase of a Smartcarry or Thunderwaer type rig.
Either way, Bravo Zulu for taking the time to mentor a group of kids a summer camp.