Hi Dave
We are allowing for four weeks... but expect the trip to take about 6 days there and six days back, depending on how much we want to fly about. We were thinking going via broken hill and coober pedy and then a different route on the way back. We will also have road crew, so some of our stuff can be carried and they will carry gerry cans to help with refueling. We are hoping to camp in remote places, as well as find some interesting towns to stay in.
I think May is a good time of year to go but im no expert.....
Rach