I'm not sure whether they always go after the jigs or not, but the times I've jigged for them, they've worked OK. If you are lucky enough to see them under a dock when they are attracted to lights you are really in business. We did that in Bamfield one time--they were so numerous that we just dipped our salmon net into the school and brought it up. Most fell through the mesh, but we caught 10 or 12 every dip. There was a sea lion who was helping out by chasing them up from below to where we could get them. It was calamari night in Bamfield...
The jigs are very straightforward to use, just watch your sounder to see what depth the school of squid are at. If you are out on the fishing grounds, empty out your bait cooler and put sea water in--then keep them alive and set up a mooching rig to mooch them live--and hang onto your hat! One thing, tho, use 25 or 30 lb test on your squid jig line as the chinook will sometimes hit it when you are pulling it up. I found out the hard way...
Good fishin--see you out there sometime.
Tom