Hi there!
We have a farm next to Koppies dam and so i fish there fairly often, stocked our farm dam with enough fish on my first time fishing the dam so theres alot of fish, only thing i fish there in the winter is worms and a float dipped in cherry(worms and all). Your doughs and mielies will produce but not at the same rate as the worms. Preferably kariba worms.
Fishing worms in summer at Koppies will almost always produce barbel after barbel but the carp take over in the winter months. Fish deep with some sort of bomb holder that rises, like the orange darts as theres ALOT of old line in the water and its everywhere.
And it is going to be COOOLD! had skin peel off my hands from the wind chill, cooldrinks freeze inside the camper and chips for the otterts, they love chowing your nets, even if they just smell of fish. If you have a fish die in your holding net or have a carp head leave it on the bank and the otters chow that instead.