Hey!
I am, unfortunately, in a suit and at work in a scorching heatwave.
Anyway, the Planetmountain guide works well and will guarantee you a few days of fun. Grades are all over the place though.
The only place where free camping is allowed is right after Pian Schiavaneis crag, just on the right of the road. You'll see tents and campers.
Otherwise it's strictly forbidden and very expensive, should you be caught.
Have fun!