We stayed at ACSI Bonnac la Côte in June 2012 which has to be one of the best kept sites we have ever visited. I asked the chap sitting outside the office if he was 'le gardien' much to his amusement as not only did he own the site it was in the grounds of his château.
Bonnac la Cote.jpg - Bild entfernt (keine Rechte)
This site is convenient for Oradour sur Glâne, which is why we stayed there, but I won't post any pictures as I don't want to spoil the experience for you.
Campers have access to the grounds and lake but not to the château itself as it is a private residence.