If you're doing conventional, try sweet flavours of floaties - banana/banjo, cinnamon/perdeby, caramel usually work. Personally Im not keen on the smaller floaties, but that might also depend on your hook size. For traces, try rietvlei or baby-shoes. Dont forget the FX boldip, and maybe another strong attractent dip, eg TCP, garlic or onion. Earthworms can deliver, as can a plain white dough, made from cake flour and a little water or coldrink. Maize kernels can deliver good fish, and they can stay in the water longer than a floatie or dough, they dont come off the hook. The river can be challenging, and if you want sizers at the dam, you need distance. Here's a thread that may be useful, if you havent seen it yet:
http://www.sealine.co.za/view_topic.php?id=35040&forum_id=80