I did it last year traveling south from Inaminka down to Arkaroola on my adventure bike with 7 others, fuel range was our biggest concern with a distance of 460kms, they where doing quite a bit of road works along the whole length, another problem was the gravel ruts on the southern end formed from the semi's and road trains heading up to the moomba gas fields, clearance will be the main issue with the van and tow vehicle as the ruts where quite deep and changing lanes almost impossible on the bikes, where are you heading once you get to Inaminka.