Yeah, realistically a refund of the hunt for the outfitter would be a serious expense. Take him back down to the trail head and out to the shooting range. Educate him and prep him. If it takes extra time, it is time he paid for and time from his hunt. If approached right you can turn an imbecile into someone competent with a little time and effort.
I do know a local guide that had some idiot fire a shot over his head from behind. He took the client's firearm away, ******ed him to camp, and the fellow's hunt was over.