Just a follow up from my post a while back.
We stayed at and I would definitely recommend:
Camping a la "Ferme de Boulogne"
Just outside La Palud on the anti-clockwise section of the D23, just before it drops down towards the brim of the gorge.
Beautiful setting and very quite with nice clean amenities and run by the most 'French' old farmer ever. Drove past the municipal camping daily and wondered why it was so popular while ours was empty.
Enjoy!
Rick