Welcome Mark
Plenty of wildcamping to be had in France, away from the beaten track, although I had a slightly worrying experience one morning.
having pulled off the road into a wooded area whilst cycling I pitched up and settled in for the night. I was woken by a slightly odd frenchman with a shotgun who seemed put out that was there. I presume that was the problem because he didn't speak any version of French that I could understand.
Que dueling banjos in my head, as I realised that no one knew where I was in any detail. Having said that most French people just shrug their shoulders when I pitch up and that included one occasion when we realised that it was someones garden.
Have fun
Steve D