Well first off buddy I feel your pain my father is going through the same situation himself, my mother doesn't want him hunting alone, and me being in the Army I am not there often enough, so I hooked him up with one of my older mature friends that just started hunting and is in good physical shape, he is eager to learn my dad's happy to teach and have someone to help him get a deer out of the backwoods where he can't use an ATV either. He still uses a deer cart designed for 750 lbs so its very stable and has oversize wide tires makes a huge difference. As far as shooting the deer in the backyard thats a personal call for you, you could always set up in the woodline and give it an authentic style feel. Or another option is to talk to your neighbors and see if you can access there property that borders yours as well. I feel your pain its rough seeing my father get older and struggle his eyes are getting worse and he had to put down the long rifle because he has trouble seeing the iron sights and has to shoot an in-line with a scope to continue hunting, and had to switch to an x-bow to continue to hunt during archery season. As long as you still have the love, and passion to hunt I say do what ya have to do, and recruit some decent younger guys to assit ya they will appreciate your help, and you will appreciate their youth and muscle. Plus the younger guys are often willing to push the woods for ya to and send game your way to ensure you have a great hunt. Hope this helps..