Welcome to the forum!
The focus of the forum is DIY, but if using a guide gets you out there for an elk hunt versus never experiencing it, I'd say look into a guided hunt that can help overcome the physical issues. Best of luck in all your hunting endeavors!
If you're out for a morning run, a hobo ambitious enough or in shape enough to catch you is a scary thought. Now me, I'd be easy prey for the hobo, but so slow that a mountain lion would be bored and look for healthier prey.
I've used Alaska Game Bags, seemed to work good enough and still cheap enough that I don't worry about keeping them. They have several different sizes.
"Thankful and blessed to enjoy the outdoors with my kids."
I've never regretted a minute spent with my kids or grandkids in the outdoors hunting and fishing. Keep living the good life and congratulations!