As Curtis said, I would seek out calm, private restitution first. A private appeal with nerves controlled can be so effective, however this is rarely used...myself included. IF that does not work, I would let him know calmly that you are going to talk it over with some of the other club members to see what they think of the situation. Before I'd do that though, I would be ABSOLUTELY sure that no progress was going to be made just between the two of you. Give him the opportunity to go about making it right. Many people will if you simply let them rather than trying to one-up them.

If he is unwilling to rectify the situation, I would continue on with notifying the other members of the club, as well as all appropriate authorities. You gave him his chance to do the moral thing here, yet he was unwilling.

A cousin of mine had a similar thing happen to him a couple years ago while deer hunting. He gave the guy a chance to make it right and ended up with a free elk hunt in CO, and written permission to hunt the offender's other private property as long as he owned it. He came through, and went overboard in doing the right thing. Not saying this will happen for you, but you never know.