Here's a good routing if your up for a bit of sight seeing.
Me and the Mrs flew it while on holiday. She had never been to SA, so I figured what better way to show her the place than from a C172 at 9000 feet.
Grand Central - Bloem - Beaufort West - Stellenbosch. (+/- 8 Hrs)
Spend some time in CPT, Stellenbosch flying club is probably the best (if not the most scenic) club in SA, and will look after the plane while your doing the wine route.......hik
Then after a few days, fly the following
Stellenbosch - George - Port Elizabeth (night stop) (+/-5 Hours)
then
PE - East London - Margate - Richards Bay (night stop)
then back to Grand Central.
Give any of the schools a call, they are normally open to negotiations when it comes to block-hours. From personal experience, if youre going to be buzzing around SA for hour after hour its best if youve got something with a little more room than a C152. A C172 works out fine for 2 pax with baggage (a little slow though). I would say an Arrow would be the best plane for the Job. Wits flying club at Lanseria have an Arrow 180 that will be perfect for the job - and I thnk it goes for about R800/Hr
Enjoy the trip.
SN