[Dacotensis]

From Experience!

If you are planning on getting out of the truck, it will be easiest to get around on packed down surfaces. Fallow field will be difficult.
Packed down hay fields are easy.
Grain fields that have been harvested are nice as well.
You can get a permit from ASRD/F+W for using an OHV.And to my surprise there is one to shoot from a vehicle-I never pull that one.Personal choice.

As for a rifle, I shoot a 300 mag. It's a little heavier. It's a little much for coyotes-I know.It's the only rifle I shoot though
For a starter rifle I shot a 6.5 x 54. I don't recall there being a whole lot of recoil with that rifle.
Very fast bolt, flat shooter would be great for open prairie coyotes.It's also light enough to handle if you are on the smaller side.
Put a sling on your rifle and carry around your neck.
You may have to pad up the sling abit so it won't cut through the back of your neck.
Where are you from and what is your disability?