G'Day Michael,
Mate don't waste ur time on the Jetty during the day, with kids jumping off all day as they do, I've never seen anyone do any good.
Try the rocks and even the rock groins in front of the camp ground. Don't cast out too far, the biggins are closer than u think. We've got some monster bream from there in the past on small livies. Just a bit of movement in the water is all you need
Doesn't have to be night either #
Cheers,
Tony # 8)