As this is meant to be the essential guide and not a mud slinging competition, let me add some advice. Mahube express as advertised on the Maun self drive 4x4 link no longer operates a bus service from Joburg to Maun. The way to get there by bus is to catch Intercape from Joburg to Gabs, spend the night in Gabs in a B&B and then be at the bus station at 05:30 the following morning to catch the bus to Maun. Its slow and noisy but its CHEAP