We are on a public lake and we don’t really have any published rules. I don’t believe that we can prevent anyone from using the courses. We do talk to people using it, get to know them. There is no requirement for anyone to pay but we do try to raise enough money to cover costs.
Regarding turns we generally don’t have issues. People are good about rotating in and not taking too much time when there are people waiting.
I think the biggest thing is being friendly and welcoming. It might not hurt to have some rules to share with people. Our course is out in the middle of the lake so you need to be out in a boat so it makes things a bit more difficult.