For any of you that saw Top Gear recently, Mercedes have developed, I believe initially for the Australian army, a 6WD car, that they are going to now mass produce.
6WD, 3800 kg, 6 metres long, 5 Diff Locks, 37 inch wheels, full leather interior, de-flate/inflate tyre controls from inside (in 1 minute),nearly 1/2 metre ground clearance, full leather interior, $500,000 price tag.
http://www.autocar.co.uk/car-review/mercedes-benz/g63-amg-6x6Now thats what I would call doing the Cape trip in comfort. And stand out from the crowd.

MarkVS