Rigs to use would diffinately have to be in the running category whether it be with a ball sinker or pulley type rig with bos sinker although these can be expensive as the oysters take a toll on your gear. The fishing can be funny at times as i have caught snapper in the stinking hot mid day sun but the best time would be change of light and even aftewr dark can be good, my best fish so far has been taken on a rising morning tide. Best baits would be mullet, pilchards or with a bit more effort piper of which there are plenty of in the sounds they just take a bit of catching. Also the best times of the year for good sized snaps is either september or again in February. Hope this helps.