Hey KingyJohn,
Check the local rivers on the DPI Fish Stocking Map: https://www.dpi.nsw.gov.au/fishing/recreational/resources/stocking
I have been up there a few times with no luck, but I did sit in the longish grass and watch a smallish brown trout as it went about it's business in the Dilgry River in May.
They're there, good luck.
Cheers,
Big Ears