Mariana Vozone
A good option
This campsite, in Canberra, is ideal for when you have nothing booked. Here there are no reservations, so when you arrive you just show up and park where you like. It has a lot of space, it's very quiet, and it has beautiful views of the surrounding green mountains. Best of all it's really cheap, and they have good electricity here - experienced campers will know how important it is to charge your mobile!