Hi Kevin, Mate your not alone in your quest to catch a NOBBIE.....I'd reckon thats every fisho's dream!!
It would seem that Mud Island produces good squire and snapper at times but mate you have to put in the hours to get the rewards.
Try the 10 metre drop off along the eastern side of Mud....Tide, moon phase and wind are all key factors in a successful trip.
TIP; make sure the bait is FRESH or ALIVE to entice a strike....Good Luck
Cheers Brent