Mate, all I can do is tell you what I do and if you go out and do the opposite you may be a chance...
actually, best thing is from what I've seen from the gurus on this site and others, use very little weight, bang a pilly on a snelled rig or gangs, and let it drift right out the back. may take a hundred metres or more to get down to where they are but they're pretty gun shy so this at least keeps you out of the way.
not sure baout jigging liveys, as I ususally cast net herring or poddy mullet.
The experts also say berley big time so get a berley bomb and drop it down.
Get out to Murphy's and sound around until you find some decent bottom or alternatively, a good show of fish holding off the bottom, then move past and do the drop down with little weight thing.
Caloundra 12 mile can also hold good snapper and should be just about within your limit. Failing that, look fo currimundi but there's shallow water around there so be careful. Best to be out early.
12 mile, murphys and currimundi are all available everywhere, just do a gps search on em.
good luck mate
regards jim