Carcassonne & Narbonne Campsites

I've started to plan our 2014 motorhome holiday to France and wonder if anyone can help with suitable campsites in and around Carcassonne and Narbonne? We will probably travel south through the Midi-Pyrenees / Langedoc-Roussilion regions stoping along the way for 2 or 3 nights. Our ultimate destination would be as indicated for perhaps 7 - 10 days before returning home. We like to be near interesting villages, towns and cities and use the local transport when we can. We don't need things like swimming pools and amusement parks but a certain amount of luxury and a good standard of clenliness is always appreciated. There's just the two of us, (no children or pets). This will be our 5 tour of Europe but we've not travelled as far south before in the motorhome. Any suggestions welcome.