What I do with a good piece of property is to go in person and take a pie or some other good gesture. You have said that the guy has never met you, so there is no personal connection, what happens if someone else asks in person? He has really no personal interaction with you. One of my properties I talked with the guy and he gave me permission and later that summer he was riding by the property and saw me and a buddy cleaning up garbage. He stopped and talked and found out that it was my third truckload, now i can do anything I want there. I like the personal experience better than a letter.