Start by maybe asking if you can have permission to retrieve game from his land that you shot on adjoining land. If he gives it to you, then thank him. When you kill a deer, bring him a backstrap. If you tracked it onto his land, tell him it is just a thank you. If you did not, even better. Let him know that you didn't, but you just wanted to thank him for the opportunity. Try to build a friendship with the guy. Next year, it will probably much easier to let a friend hunt the property. And even if he doesn't let you hunt it, you may just make a new friend anyway.