I'm in the 'same' boat as you, New to the coast from central NSW now in Buderim. Just joined the Coast Guard as an associate member (need to get my radio ticket). Type in "Murphys Reef " in google and you 'll find gps refs for the area. I've not had my boat in the water yet .and am keen to go. Give me a call on 0447160034.
Cheers,
Paul.