I also live in the middle of nowhere, on 6 hectares of land, and have 4 cats. 2 rescues and 2 ragdolls that had free access to the outdoors. Then a roaming dog killed our chickens, and we were worried it could have got the cats, particularly the ragdolls. Not long after, our beautiful 1 year old tortie was run over. We're about 400m from the road.
So now we have a catio and 3 stay indoors. 1 is allowed out because he keeps close to the house.