I think it may be helpful to point out a couple of things:
This recent spike in violence is related to a taxi strike. Taxis in this context refers to the 16-seater mini bus taxis that are the woeful substitute for what does not even pass as a public transportation system. They are NOT metered taxis like you would think of in London or the U.K. They follow set routes are are more like busses but I personally would not advise a tourist to use them.
To the PP who asked, be careful asking for directions to a taxi rank. A random local would probably direct you to a 16-seater bus hub which, and I mean this nicely, is not where someone who does not know the country very, very well should be.
Car-like metered taxis are few and far between. If I’ve needed a metered taxi I use Uber.
That said, during the recent strikes, I believe that Ubers have been scarce in some areas.
I what I’ve noticed around this latest strike was that violence was limited to small hot spots so it was key to know exactly which streets in which areas to avoid. For example, in Hout Bay, which you drive through to do the scenic chapmans peak drive, one of the routes through the village was problematic with kids throwing stones, the other route was fine. You just needed to know which was the safe route so don’t blindly follow sat navs. Make sure you understand where you are going.
If I was arriving early evening or any time after dark, and you’ve not driven in South Africa before, I’d consider calling the hotel and asking them to arrange a collection for you - you know the type, where someone meets you inside the airport with your name on a board kind of thing.
Leave the hire car collections for daylight hours once you’ve had a good nights rest - particularly Cape Town airport (which is what I know well) because it would be incredibly easy to miss a turn/exit. Trying to turn around at a junction on the N2 motorway between the airport and the city centre takes you through some pretty unsafe areas.
I agree with a lot of the advice. Aim to be inconspicuous - in both your appearance and behaviour. You’ll soon get the hang of the situations where it’s fine to behave like a tourist and others where you need to keep a low profile while keeping your head up.
on the N2 between Cape Town and the garden route (and beyond if you are going to Kariega) you’ll see the motorway services which are fine. Shell Ultra Cities and Engen 1-stops are huge and well frequented.
As an FYI, one bit of etiquette around Rhinos if you are lucky enough to see them is that it’s very bad form to post photos of them on social media and tag where you’ve seen them. Please don’t inadvertently tell poachers where they are!
That said, South Africa is beautiful place. It’s really special. The one and only is pretty spectacular. The thing I like about visiting there generally is that the food is usually very, very good. I’m jealous of all of you going soon!
But OP I’m curious about your £3500 driver quote - what exactly did that cover??