Join Date: Jan 2014
Location: Pompertuzat, France
In August it will be very difficult to find the tourist-less France of your dreams.
One option would be to travel the paved section of the Canal du Midi from Toulouse to Avignonet-Lauragais. Then take any of the D roads into the region bounded by Castelnaudary, Mezamet, Beziers, and Carcassone, and Narbonne. If you go all the way to Narbonne, you could ride around the Mediterranean. Closer to Mezamet and Saint-Ponds-de-Thomieres are some wonderful forests, hills, and mountains. Plan your route carefully, there's a million ways to go around, but you want to be sure you avoid a lot of the HC and Cat 1 climbs.
This area will have a lot of cyclists, but almost all of them will be French, with a few Spanish and English. The Languedoc, IMO, is among the most incredible places in the world to eat, cycle, and camp in August. The food will be excellent everywhere. And all the bigger towns I listed above will have an Intermarche or a Carrefour to stock you up.