Might I suggest you contact the Clermont-Ferrand Tourist office - their email address is http://tourisme@clermont-fd.com or look at their website on http://www.ot-clermont-ferrand.fr.

You should also look up the Auvergne region of France. It's a lovely area, with impressive volcanoes and beautiful countryside. Sorry I've never camped, (hotel stays) but can recommend the area for a peaceful country holiday.