Burley some bread up in small hand fulls. Soak the bread before throwing it in the water. Green peeled prawns or cook prawns for bait. Small pea sinker on a running rig with a size 4 bait holder should see you catch a few drummer. Just make sure to have a supply of sinkers and hooks as your bound to lose a lot of gear.
Just make sure to check the wind and swell before you fish the rocks. And make sure you have the safety equipment and gear before you venture out on the rocks. Also never fish alone.