Ended up hiring a Toyota Landcruiser 105 series 4.2 diesel non turbo. About 1 year old, had been lifted on OME suspension, bull bar, side bars, side steps, roof rack, roof tent, storage box, cargo barrier, storage system, 40 litre fridge and all camping equipment. Came from Britz. Cost about £45 per day but with a AUD$5000 excess. We paided £70 a day, no excess, insured for any recognised track so you could take it offroading. Did some pretty full on tracks in it. Good company to hire from. Vehicle really well kitted out down to cuttlery, cooking gear, stove, gas, fold out seats, the lot.