PP,
No need for licenced airfield to hire out an aircraft.
As long as it is on Public Transport C of A you can fly it anywhere.
Otherwise you would not be able to fly with anything you hire to anything else than licenced fields.
Would that not be a terrible shame for a nice and shiny whit and red tailwheel aeroplane?
It loves playing with its mates at all sorts of lovely (unlicenced) strips (or so I have heard!)
FD