Two other thoughts for trips to interested parties. The Association has access into two gated National Parks camping areas.

The G​len
As best I can work out this is The Glen Nature Reserve in the Gloucester area. Charge is $50/club using it. Need to report back to Parks. Trailer and camper friendly access

Dingo Dell
In Kanangra-Boyd NP access from the Oberon area using Kowmung Fire Trail. $12/vehicle

Both are said to be great camping spots.