I have 15 chickens (1 roo, 2 cockerels, 1 hen, 11 laying pullets) on 20 acres, free range. They stick to 2 acres surrounding the house, still get food and water from us, but we stopped locking them up. Some lay eggs up in the trees. They roost at night in the coop or garage/barn rafters; all roosts are up high. We don’t have a perimeter fence, although there is a fenced run which we used to close the gate at night. Now we leave it ajar because some of the new flock was unable to scale the fence to free-range and they were hurting themselves trying to get out before we got out there. We do have a free-range dog who is good at keeping the coyotes away.
I am under no delusion we may suffer losses (mostly to dogs), as we have in the past, but this set up works best for us atm.
So full on free range survival, not really. But definitely free range. And surviving for now.