For what it's worth, my understanding is that the track to the Mt Difficult Cliff is originally a climbers' track, cut on a series of VCC working bees in the 1960s. It's a bit rough for Parks to close the track just because they want to close the camp site at the bottom or don't want to maintain it. If Parks don't want to be bothered with maintaining the track then it should be treated like the old track up Mt Rosea - a sign to direct tourists away, and just leave the track for climbers and any other free spirited people to use.
The track heads south east from the Troopers Creek camp ground. If you park just south of the camp ground and head east or north-east into the bush, you will soon pick it up.