I'm going to try again this week, got some good tips from people on how to improve my chances. Last friday I had live/fresh squid under a float for about 6 hours for nothing though, and the two weeks before that were similar stories, so I'm trying to refine the techniques.
One positive is that I have no troubles at all getting fresh squid even when they aren't about in big numbers - I've taken about 10 in two outings, even got one on a little metal lure meant for bonito.
I've been tempted to just book a charter or something so I can catch a king and go back to getting some sleep, but I kinda want to do it properly myself