G'day Mike
The Lake Awoonga Caravan Park has pretty reasonable facilities and has the added benefit of being right there, with cabins, bunkhouse, donga, van sites , and tent sites, powered and unpowered. http://www.lakeawoongacaravanpark.com.au/
But if you don't mind the 10 minute drive, you've also got Willowgrove at Benaraby which has pretty great facilities and is up for a major rehab over the next 18 months. www.willowgroveontheriver.com.au
Hope this helps!!
Geoff