In reply to MG:
Don´t know what you mean by Italian side, GP is fully in Italy.
Otherwise +1. The first site next to the parking lot also has a small shop with an excellent selection of local cheeses!
The second one is more protected, but can be a bit shady in cool weather. Make sure to get a pitch at the far end, as the waterfall with drown out all noise from the little bar at the entrance (I always pitched my tent at the uppermost platform).
CB