If you haven't done so already, Paul, have a good look at the Languedoc, in particular, the Minervois. It's where we have a home. It's an area where you can be as isolated as you like, or near to small villages and slightly larger 'towns' if needs be.
Handy for flights too, from Carcassonne or Beziers, with good old Ryanair!!
Good luck with the hunt