A via ferrata has recently opened up in a former tuffa quarry in Demjen. Looks pretty impressive. So you should have your climbing gear with you. The approach from the village takes about 15 minutes. You can return through the extensive vineyards.
Short, challenging routes... a 15-minute hike from the parking lot. There were a few other people there on a warm September Saturday, but there were no "traffic jams" on the routes. Next time I'll bring an old pair of climbing shoes for the harder routes; they'll probably be more comfortable for the smaller footholds on the rock.