ive just come back from a week at
http://www.campinglechti.com/en/welcome.htm the cycling scope in this area is fantastic plenty for all types of riding and i was told its also on the tour de france route so an ideal place to stay if you want to watch that.
as for the campsite its a fantastic place to visit english owners go out of there way to make your stay comfortable they have shalets and touring/camping pitches every thing you would want on site and there are lots of places to visit in the area.