Plugs work...here yep...
However, Anchovies work better.
I have had some good days fishing nothing but plugs off the Fraser. I had one really memorable day when I mistakenly left the bait box on the kitchen counter at home.
..and there have been a couple of charters where I have fired out the plugs in desperation since the anchovies weren't getting it done....fishing was scratchy. I am sure that the plugs allowed me to cover a bit more ground and allow me to put a plug in front of a fish.... Which may not have happened at regular trolling speed.
Be prepared to sit and wait...and wait...and wait...when you get one, it'll be a good one.