In reply to teapot:
I personally wouldn't advice it for a first trip, the circuit is rarely climbed and a lot of the top out are covered in moss, dirt, leaves etc, there are also quite a few high/ exposed problems. The walk-in is fairly long if you're carrying a lot of stuff.
Having said that the blue sentier denencourt which follows the edge on which the circuit is locaated is one of the most beautiful walks in the forest. If you do get up there have a look at the 6A arete of 'sexe and dentelles'.