Thanks for the reply, I have checked out my distances and just want to be sure as am planning to travel from Qld leaving early May, down to Flinders Ranges then up to Darwin via Lake Eyre, William Creek, Coober Pedy; across to Qld via Lawn Hill, Normanton, Cape Trib, then back down the coast, 5 months of adventure. Some on dirt roads, towing a 09 Jayco Starcraft rear door, little pop top called N,Eddy. I too was thinking of 20 litres extra, maybe carried on roof rack with extra spare. It's a bit daunting as the male partner is staying home and the female of this household is doing all of the extra add ons. Have just had a WDH fitted to the van, feels a lot better to tow. The installer suggested heavier duty rear springs and am checking that out on Monday. Being an artist the $'s are not that consistant as most folks, but the urge to become a silver gypsey is too strong to ignore. Hope your trip is fabulous, watch out for the head winds on the Nullarbor, stay safe and have fun. John Lennon wrote "Life is what happens to you whilst you are busy making other plans" Regards Potter