In reply to chris_r:
There's a bouldering guide - cheap pamphlet style - available in the climbing shops in Arco
Passo San Giovani is quite a pleasant spot with ok landing etc, although definitely not as nice as Font. The area directly opposite the campsite in Arco has some ok bouldering too,
There's some further up the road under the Placce Zebrate too, but definitely don't take the kids there - the woods are full of human, erm, detritus from people camping in the laybys. (This was a few years ago, I hope the police are coming down far harder on the filthy bastards these days)
Post edited at 10:10