hope your not keeping or eating those bream, i heard they are bad and toxic. why not try east side of sydney harbour? or under sydney harbour bridge from kingie and big breams
i use bread fishing. buy some bread, put it into the water and through the bread down into the water as burley and you see yakkas coming up. buy a yellowtail jig and they just hook themselves
if they are there busting up in light you dont have to berley and you will still get hook up. but if you berley, they will go feeding frenzy and it is easier to catch yellowtails that way.