The four wheel drive trail to near Mt Barakee has nothing to do with the much older railway survey track up the Colo Gorge. Which did go from Upper Colo to the Rhylstone plains. We have walked enough of it. Townsend was slightly mad. And yes, his track does go up and down the cliffs!
In the Wolgan, they got to the Luchetti Farm at Anne Rowan Creek, and a little beyond. But past that there was a big landslide area that they could not find a way through. We have walked that valley too, all the way down the Wolgan to the Colo-Capertee junction (eventually to Upper Colo in fact). But beyond Annie Rowan we were walking IN the river, through lots of quicksand. The chances of getting a road down that valley were and are zero. It IS a gorge. The chances of driving across the river bed without sinking terminally in the sand are zero.
This is in the gorge. Room for a road - or even a 4WD track? Ha! The stick in my hand is 'Snake', because it has a snake head. It got us out of the quicksand many times. We brought it home in honour.
While the Lithgow 4WD club may have driven down that track, and maybe even cleared bits of it, I really don't think they created the track in the first place. There was a fair bit of bulldozing involved: that cost! It would have made sense for the Luchettis to pay for a track access to their farm, but not for the club. At the AR end the track does actually go down to the Wolgan and cross it to the pastures. Half way along the track there was a cattle stockade made by stringing old mine shaft cables (from Newnes) around trees: not the work of a club.
They made use of the Mt Cameron Track that went out from Natural Bridge to an old farm on the summit of Cameron. The track went a few kilometres beyond to a place called "Permanent Water" and then a short way past that. The 4 WD group then extended that along ridges towards the Colo. When they got close to the Colo rim they again ran into difficulties and gave up their attempt.I repeat, we have walked from Natural Bridge to the Colo road - well, to the Culoul Range FT anyhow. We were following an old cattle track the whole way. Some parts of that route we have done several times. The Lithgow 4WD club may have driven out along the old track, but again I doubt they paid for the bulldozer work - which was extensive in some places. Yeah, they would have run into difficulties when they reached the rim! But we followed an old cattle track down into the Colo and up onto the plateau on the other side. As I said, it is just one of several duffing routes.
Interesting Q about pre-GPS days. We still do not carry a GPS today, and we manage just fine. I am sure many others are the same. We just carry an extra day's food in case.
Cheers