Have just been to Dungog NSW in the hUnter region and found as the CP is no longer available they direct you to the showground.
Powered site is $19/night unless you are a member of CMCA and then you get $4/night off. (A better price for the facilities available).
There is one toilet block with one shower in the disabled toilet. Water is nice and hot. Wechose to wait our turn to use this one as the others (under the grandstand were not very nice).
Lovely little town - but roads in are not crash hot. Make sure everything is secure in the van - or you'll find it on the floor!!