There is a free public dump point available in Renmark, in the car park of the Renmark Swimming Pool.
Be cautious of the approach to, and exit route from, the dump point, especially if you are driving a larger RV.
After entering the car parking area, we steered towards the left and pulled up into the marked area next to the dump point. However ready to leave, we discovered we were fronting two driveways through the car park immediately in front of the swimming pool, both with arrows pointing at us. The area to our right, a large open car parking area, had trees obstructing us from managing any form of turning circle and we had no option but to drive against the arrows of one of the aforementioned two driveways, until we could turn right into the open car park and exit on to the road.