I think we will see a lot of hats in this thread. There will probably be lot of standing around and fixing stuff if all the talk about the Richtersveld is to be believed. For the Richtersfield you must take a spare everything. And that is before you hit the sandveld before the Port (Nolloth).
Better if you all move to the west coast. It looks like you spend most of the year trailer the bikes from the east coast to the west coast. West coasts are the best.