However, it's very probable that neither crag has seen much visitation in recent times.
Reasons?:
These crags are a long journey from the nearest coffee shop (Mittagong).
It's trad/adventure climbing. No 'clip-ups' and chalk marks to show the way.
Perpendicular Rock is on land said to be owned by the Milat family who may not currently welcome people visiting their property.
Likewise, the Lanagan's Falls crag is on private property. Also, vegetation on the approach and on the cliff can be an impediment.
Notwithstanding all of the above, spend a few days camped by the river and explore the area. There may not be much climbing in the 13 - 14 grade bracket but it's a nice environment for a relaxed sojourn away from "civilisation".