If I was going to do that trip Terry, I would have chosen a better 4WD. I have used Nissan, Toyota and Land Rovers where there were no roads or dirt roads and the Toyota was by far the most rugged and reliable. Plus spare parts were more readily available (you would only need consumables anyway).
The diesel version in the video has a 6 cylinder BMW engine. Given that the UK Police have stopped using BMW cars due to engine problems, I would still stick to a Toyota. The Grenadier costs from 68K to 79K to buy.