eric replied:

Did the Gibb River Road with a golf camper, similar format to the Jayco Hawk. Mine handled the corrugations well, it has independant suspension and heavy shocks. The leaf springs on the Jayco seem to be solid enough but I would pay attention to the externally hung water tank and exposed hoses on the Jayco (apologies to Mr Jayco if they have changed these recently).Common sense, addressing tyre pressure, loading and speed will see you along this magnificent piece of country.