Hi Jim; the nearest campsite is not far away, situated at a lovely little town called Ambrieres-Les-Vaux; it's on Rue Des Colverts and called Camping Le Parc De Vaux. However, although I have been to Ambrieres, I have never stayed at the campsite and can tell you nothing more about it.

I think Rennes might be useful for you. Flybe has flights going from, I think, Exeter, Birmingham and London City airport. Maybe also Southend. Also, Flybe flies from Southend to Caen, which would also be worth considering. Whichever you choose is a pretty long drive but Rennes and Caen avoid the mad Paris traffic! Hope this is helpful.