u got the right spot, just be persistent, give plenty of time top quality jigs and meyb even hang a pilchard off a float aswell. its a large area so id say even 2 hours wouldnt be enough time to cover the whole of south head and down. If u do get some squid try the dropoff on the north side of shark island or wherever u sound bait around the pylons. Also try bald head (the east side) --> these r the only 2 places ive read bout. For kings the latest report says theyve been caught around rosebay but id work my way all along the coast up to south head from rosebay aswell. Gd luck! if u catch stuff make sure u post a report and if u know any extra spots id be happy to know. I must warn you that im quite open about spots etc and like to encourage sharing of info