You say to him I have tried this the nice way,and now he either changes his tune or you are going to hunt it any way!
Now what I would do is engage in a relaxed conversation and mention to him that you have permission to hunt two adjoining properties and you would be appreciative if he allowed you to archery hunt his property on a trial basis,if there was any thing that was disturbing to him you would cease right away! The trial basis implies a lack of permanence and may not be as threatening to him. Good luck!