Dang half, I sure do hate to hear that. I have read quite a few of your posts, and I will say that you don't seem like the type of fellow to let this slow you down. I will admit that I don't know much about that kind of thing, I hunt a lot of public land for spring turkeys here in Western NC, and I don't remember special places or access for wheelchairs, but they may well exist in your neck of the woods.
If I were you I would call the local fish and game office and talk the situation over with them, my bet is they will help you out. Best of luck, be sure to keep us posted on how everything goes.
Jake