Molesworth 1
I agree with flying lawyer, except also to note that given the SA naval base just a few miles away at Simons Town, one could expect to be in the officers bar with a pint of Windhoek before the damp even reached one's underpants
A couple of other great spots within a couple of hours of CPT:
Cape Agulhas...officially the Southerly most airfield on the African Continent. Let one of the restaurants in L'Agulhas know you are comming and they will pick you up from the strip
Tanqua in the Karoo national park
Tanqua Guest House (route 355) - Tanqua Guest House (route 355) seelf catering accommodation in the Tankwa National Park near Ceres Western Cape. Private strip but with excellent guest house and unbelievably beautiful flight from CPT
Enjoy your SA flying