only luck I have had with a dip net is huge summer schools balled up tight. like jumping out of the water tight, only in this mass hysteria can you motor close enough for them to not run away in MY experience. in open water they simply dive faster than you can move the net. I haven't seen a ball that tight since the early ninety's. In the 80's we dipped spawners in the spring/winter, Elliot bay under the restaurant in the AM. but that was from the bank so they couldn't dive.

As for the jigs' I was very successful till about 2010 (last time I really worked at it.) by trolling the rip lines at Possession using the jig on a trout pole casting ahead of the boat and reeling in fast. did that at Point no Point also sometimes.
other than that there are many beach and pier locations that you can jig them up in the winter when you are not steelheading. cash and carry sells trays, and a vacuum packer... and frozen bait. a good deep freeze set really cold and they are usually OK if used that summer. I always brine'd with powdered milk and saltwater, as they were thawing.

thats about all I got on the subject. anyone else?