Sorry dharawal. I still owe you a Road Trip.
Why not fly? Well, due to the crap airfare deals you get here it would cost $700 Sydney to Darwin return, + car hire, + driving to Sydney Airport and parking in the long term car park. It's cheaper to drive. I have the time. It's not like I have a job or anything.
Trip plan. Approx. distance 3800km each way.
I'll be able to colour in a bit more of the Where I Have Been map.