I happen to belong to the caving club,in fact i one of the committee members. You can check out a website called www.Darklife.co.za
...yes i know sounds a bit gothic.
The Cape penninsular speological society does monthly meets at areas such as kalk bay,
Table mountain metro system and away meets in various parts of the western cape or south africa.
There is a wealth of knowledge to learn from the guys and it is dam fun.
If you in Cape Town then Pop in to CityROCK, ask for Tarryn, i will give you all the contact details, otherwise darklife should be able to piont you in the right direction.
Chow for now....