Depending on you tackle but take some heavy jigheads i fish even up to 1 1/2 oz and make sure that you're hooks are strong. Chartreuse, pearl blue, pearl olive and mullet are my standard, i rarely fish smaller that 5 inch. At the mouth on the falling tide concentrate your efforts fishing on the reef into the sea, the kingies rush into the mouth to feed in the tanin coloured water. To me the most productive area is south of the mouth, fish around the reef and look for working water, Andy Coetzee says that the crapper the water looks the better the fishing. Not sure where you are staying but one limitation of fishing Kosi is you're only allowed into the reserve after 6AM and have to be out by 6PM. If you have the opportunity, check out Banga Neck and dog point, to my mind the best spots in the area. We're at Banga from the 8th, good luck.
