I think Gadget has it right, the MCSA are your best bet.
Drakensberg boasts some long adventure routes, however due to the poor and flaky quality of rock it is only done by a select and brave few. (Most of which are MCSA members)
Otherwise the berg is great for hiking, January will be quite hot. If you are fit and enjoy mountain passes, check out www.bergfly.org
for a desciption of some os the passes. If you are just interested in hiking/camping and not climbing you can also get in touch with some of the local hiking clubs.