I have no experience with the cormandel so can not offer location advice.
But buy good quality pilchards and keep them on ice, you should be able to get away with fishing without a sinker.
Set up a burley when you first arrive, and you should be able to catch more fresh bait. Having a light rod for bait catching could be a advantage…. Maybe also consider sending out a livebait for a kingfish if they are around.