Havent been there recently, but visited another venue on the Vaal about a week ago. We didnt do too bad, I landed 6 carp, biggest was around 3kg at 120m, smaller fish came out at casting distance. The usual sweet stuff (banana/banjo, fx, bunspice), earthworm or garlic worked.
The best is to go see for yourself, have a general strategy and try out the usual stuff that works at the Vaal.