Lake Lyall just out of Lithgow, NSW, is another great place to camp. There are sites right on the waters edge. It gets a bit busy with skiers from time to time, but that was half the entertainment. It is within striking distance to the Jenolan Caves, which is another great day out, but a very steep winding road to get there, especially if you are in a big rig or towing a large caravan.
Cost: When we stayed, it was $15/night per site.