goldenticket - last year we stayed in Campsite Domaine du Verdon. This is in inland Provence. It's a bit of journey to get to as the last bit is windy roads. It was a pleasant site, quite quiet within walking distance of Castellane. There was a river along the edge of the site which the DCs really enjoyed playing in (actually we all did). Gorge du Verdon is amazing.
Almost all inland campsites will be pretty quiet. Our experience is that there might be a disco or some such (often only a couple of times a week) but these will normally shut down at the latest at midnight. Most campsites are arranged so that all the facilities such as bar, pool, shop etc are all together. The pitches are then mostly away from these.
Campsites are aimed at families so on the whole they will tend to be fairly restrained. It is only on the coast that they can be a bit 'kiss me quick'.
This year we are booked into a small site based in a vineyard in Languedoc.
We have been staying in campsites for more than 15 years. We normally stay away from the seaside as I hate sand and salt water (and I do the booking!).
A lot of people like the Vendee (atlantic coast). Personally I found it too flat. We have stayed a number of times in the Languedoc (great for castles).
What type of thing do you want? How far are you prepared to drive? Sea or inland? Baked or green? France is a huge place, we have stayed in most regions so it just depends on what tickles your fancy!