I have been to a couple of days at Gerotek, it's great, not difficult, but more of a mental challenge.
I have gone with the ST and RS clubs days, it's open to public still on these days nad cost is around R250.
Let me scout for the next day with the RS club and we join either officially or unofficially. The guys are great and there is always a group of AMG, Audi RS, and the M cars that pitch up.
It is well organised and extremely safe, every car is inspected before getting on to the ring for tyre wear etc.
My last visit, I had the diesel record for the day at 223km/h (stock E90 330d with 17" tyres). Some more speeds that day:
Porsche 911 turbo, 236km/h - I know the guy, he was a bit scared
Megane RS - 244km/h
M6 - 265km/h
M3 - 261km/h
325iS turbo - 270km/h
Old Toyota Carolla turbo - 250km/h
Let me know and I can try to find out some more, it will be a great experience and it's nice for the whole family, nice grassy lawns to braai etc:thumbs: