Winter isn't the best time for kings. They head offshore during winter but there is still the odd fish around. It really depends on where you are hiring a boat from. A few locations fishable in a hire boat would be the weddingcakes, sow n pigs, Off Bradleys Head and anywhere that is deep with plentiful bait. Your best chance is to get some livies and squid. The John Dory are around at the moment and im sure you won't mind that as i by catch! Like i said, it really depends on where you plan on hiring a boat from.