Join Date: Jan 2015
Location: Bregenz, Austria
Programs: AA, BAEC, Alaska, Flying Blue, United, IHG, Hilton
Posts: 2,950
Within Cape Town itself, Uber is a very solid and very good value option.
However, for exploring outside the citu, nothing beats having your own wheels.
If I were doing your proposed itinerary, I would use Uber for the days spent in the city and pick up a rental car when you're ready to get out and about.