No special access issues
From the centre of Domusnovas drive to the east entrance and at the big roundabout go north (sorry but at the roundabout there are no indications). Drive 6 kilometres and then take a sharp left turn in the direction of the Grotta San Giovanni (northern entrance). Look well at the map we included, that's the easiest way...
Drive 1.5 km more, and park on a widening of the road. The Crag is just above the road, on your right side.