Unless there has been a recent rain event, we have found the gravel roads in the area to be consistently excellent. After one rain event we got pics like these......
If you go to Mt Augustus, you should also go to the Kennedy range, a couple of hundred km to the west. Lots to explore and if you want a treat there is a track up the western side that goes up to the top and down the other side. Not too difficult, but leave the caravan behind. We spent a night on top. Great views.