for me A$970 paid for all of a three week, 4922km, camping/hiking/sightseeing/road-trip south along the great dividing range.
2/3 of that went for 420l of diesel (my car is reasonably economical even with the brake parachu^W^Wroof top tent in place), and the remainder covered (national park and other) camping fees, some grocery shopping and a few coffee and cake breaks. i mostly camped in cheap or free places and somehow i can't bring myself to eat out even when i'm on the road (at least when travelling solo), which should explain the low cost.
i've long wanted to see more of australia. being off work right now makes this the perfect opportunity to travel, except that the season is not ideal for visiting central oz (late summer/early fall is both hot and normally the rainy season); furthermore the current drought makes the inland regions a bit less appealing than usual (ie. many creeks and rivers are bone-dry, fire bans in many national parks and so on).
so i decided that i'd tag along the great dividing range towards the south, visiting most of the higher areas on the way - for the views, the hiking and a bit of cooler weather. the tentative plan also included visiting the victorian alps and possibly the great ocean road as well, but that part of the plan went up in smoke - lots of nasty bushfires in victoria, pretty much exactly where i wanted to go - so the eventual southernmost goal shifted to mt. kosciuszko, the highest hill in oz.