Thanks-- this is all very good relevant advice. Hadn't thought about digesting composter at all, but that's a great idea.
I don't mind too much if people respectfully visit the island when we're not there. We told the really awesome neighbor he could visit the island whenever, so maybe he'll guard it a bit. He could certainly see from his dock if another boat was on it.
Just be careful with hunting. My wife and I have an island as well, and a couple weekends ago one of our dogs was shot by a hunter not playing by the rules. Unfortunately people will try to take advantage, and people are often less responsible on your land than they would be on their own. Also, letting people onto your land can lead to fires, garbage, and liability issues. Of course, it is always good to share what you have, just be careful.
I don't mind too much if people respectfully visit the island when we're not there. We told the really awesome neighbor he could visit the island whenever, so maybe he'll guard it a bit. He could certainly see from his dock if another boat was on it.