Possible solution
The township next to mine has a great way of dealing with private landowners and getting permission. They require anyone hunting in the township to carry a card (that changes color each year) that must have the signature of the landowner you have permission to hunt on. When the police see a hunter they automatically ask to see the card. If they do not have it with them or have the signature of the landowner on it they get a ticket regardless of the landowner "reporting" them or not. No questions asked. This seems to work real well and believe it or not, getting permission is not hard to get as the landowners have to meet everyone and since they carry the card and know they can be asked for it at any time they hunters tend to behave for the most part.
The township next to mine has a great way of dealing with private landowners and getting permission. They require anyone hunting in the township to carry a card (that changes color each year) that must have the signature of the landowner you have permission to hunt on. When the police see a hunter they automatically ask to see the card. If they do not have it with them or have the signature of the landowner on it they get a ticket regardless of the landowner "reporting" them or not. No questions asked. This seems to work real well and believe it or not, getting permission is not hard to get as the landowners have to meet everyone and since they carry the card and know they can be asked for it at any time they hunters tend to behave for the most part.