G`day Patty.
Did the Canning in 08 with 6 vehicles 2 of us towed camper trailers did not have any issues.
We took 21 days to do it and we think even that was a bit fast. so a couple of tips keep the speed down, run low tire pressures we ran 18psi with no flats.
If you intend to travel quickly carry spare shockers F and R learn to 12volt weld carry small pieces of flat steel to make brackets and gussets, batt powered drill and angle grinder.
Also I carry ground pepper for any radiator leaks it works great. Apart from the above I would carry just the usual bits and pieces. The corrugations can be quiet server and for long stretches
so keep the weight down and travel slowly