This road they are using for the hill climb is one that starts from a carpark next to valley lake and up out of the valley onto Bay rd.
http://sgp3whereismap.whereis.com.au/gns/s...60496284403.gif
Road use to a bit rough, but that was a fair few years ago they may have done work on it by now.
Great area to visit wineries are 30mins away, good caving and beaches(fishing and diving) are 20 mins away.
Car culture is fairly strong down there, due to country town also avalibility of high paying jobs to younger people in the forestery inudstry.
Beware the police though, Mt Gambier is the highest area in the state for car impounding under the new rules that came in .
Cheers
Brad
Edit : Right were this track goes past is a caravan park / camping ground, which could be a cheap option for the two days.