Check with your local game warden. Many state owned game lands have wheelchair accessible hunting accommodations or allow disabled hunters special allowances to help them out.  The allowances vary from state to state but could allow you to hunt from a car, setup a bench rest, or have other assistance to help you get that big buck or your limit of small game.  Another great source of info are your state congressman or senator.  If you call their office they will make sure you get all the info you could want!