He probably thinks that you're gonna kick him out permanently , it may have happened to him before . Locals get very sensitive if you buy a parcel that they may have hunted since childhood and then lock them out . Reassure him that this is not the case and that you're open to discussion . Huntable land may be at a premium where you are now .

I'd at least let him finish the season with written permisson in case the game warden stops him since you plan to post it , then discuss options for next season . Why make an enemy now ? He may have something you want or need to trade for permission next year . You may need bushhogging or other ground prep that he has the equipment for . You can always work out a schedule of use too , maybe he has more time to hunt during the week than you do , or vice versa . He could also help you watch for trespassers , and may even be able to get you permission for the 10 acres as well as other spots .