if there are oyster beds, whatever you rig up you'll probably want some strong leader line (mono or floro) at least 30lbs test - it also might depend on what species you are going for. This is because that line will start rubbing against the abbrassive oysters and will start to fray over time, also fish might try to wrap you around the dock and having a stronger leader will help you keep the fish on longer. You'll probably want to check the leader line often and change the leader line out if it has a decent amount of fraying.
At the end of the leader, it is up to you. Fish live bait, or cut bait, or artificial.