South African Tips: Moz/Zim/Bots/Zam/Namib?
 

I'm planning a trip and would appreciate any knowledge about visas, road conditions, petrol availability, or whatever.
Can anybody tell if I need a yellow fever vaccine for this route?
Visa costs and if they need to be arranged ahead of time (I'm from the US on a temp res permit in SA).
From the Berg, through Swaziland, up to Chimoio, Moz, then to Harare, then Bulawayo.
From there, either up to Vic Falls and over into Bots/Namib from Zam, down to Ghanzi (or maybe over into Namib from that arm that sticks out to Zam)
Or to Nata and Gweta, then across to Ghanzi,
Then from Ghanzi, either down to Gabarone and back into SA, or west into Namib and then down through Windhoek, and back to SA.
Any ideas or comments would be much appreciated!
Adam