Being an ex SA guy, I'd love to go back and shoot the worlds there.
I'm pretty confident the chaps will put up a decent competition.
Just remember, the country is very different to UK , as in the people on the streets, so you must try and either hook up with local SA guys , or book in with recognised travel companies.
A sad fact of life , if you stray away from the recognised routes into bad lands , you may be a victim of some sort of crime.
My advice is to hook up with an SA shooter or the travel companies, they'll show you every thing with safety as a priority .
Looking at the pictures , I'd say a reasonable amount of fitness will be required to get around , and have a good shoot .
It'll be interesting and fun .