The pontoon next to the boat ramp at Deep Water Bend is a popular spot with the land-based cast net brigade. At this time of the year you'll probably only get herring but it's a good spot for prawns from after Christmas through to about April - may. There is a big snag off the upstream corner of the pontoon, I think, which has destroyed many a cast net, so try to find out from someone else where it's safe to cast
Cheers Freeeedom