Sofala & Upper Turon i.e. Turon Gates as above would be worth a look.
The good thing about the area is if the missus & kids get too bored or need something else to do Lithgow, Mudgee, Bathurst or even a day trip to Hill End aren't that far away - maybe leaving you on the river to your own devices if you get a camp in a good spot to detect or highbank or both.
That leads me to the bad point about Sofala. It can get pretty hard to get a good spot school holidays or long weekends etc. once the weather starts getting a bit nicer. There looked to be quite a few campers around close to the village yesterday when I drove through already.
The campgrounds are pretty basic with only one having drop dunny's & no other facilities.
Ophir might be another place worth looking at - close to Orange & Bathurst. Pretty sure there is still only a toilet block there but no showers etc.
The water will "cool" you off at this time of year still :lol: