Some reviews of Domaine de Drancourt, here:
http://www.ukcampsite.co.uk/sites/reviews.asp?revid=3442
There are no reviews of Bois de Bardelet. However, we've been lots of times for short stays. It's a good family site, with an outdoor pool and slides (small), indoor pool and sauna, and lots of activities going on for children and younger teenagers - and I think they run a weekly bus trip to Disney. The pitches are excellent - a really good size in the newer area through the wood. There's a reasonable restaurant, but we were disappointed with the take-away. Shower and toilet blocks are fine - there are two and a smaller one. There's a shop on site selling most things you need. The site is near to Gien on the Loire, in a rural setting - no village within walking distance, but good cycling country. Gien has a couple of large supermarkets, good shopping, a Chateau and a Museum, and nearby is the Pont Canal (canal over the Loire on a bridge - quite a surreal vision to see boats going over a river) at Briare.
There are no reviews of Domaine de Dienne - but it's a Les Castels site, and they are usually of a high standard.