Yoshy,
I did a 5week trip from melb to the tip back in late july-august this year in my GU Patrol as a solo driver, with my 4yr old son. Man what a adventure it was, excellent trip. Yes it is starting to get a bit late in the season, but there is heaps of travelers going both north & south to help out at any stage if u get into trouble at any stage. All can say is play it safe & try to hook up with another vehicle or more on your trip thats going in the same direction. You will meet other traverlers at Archer River camping ground & Bramwell Station or Bramwell Roadhouse to travel with. Make sure your vehicle is fully up to scratch & good recovery gear, it gets pretty rough out there, the tracks take out the toll on ya vehicle & have good maps of the area & plenty of spare water & food,
All the best mate, have a very happy trip & play it safe..........its a trip you will never forget