Got into 6 hatchery kings the last couple of days. These are pretty big fish, averaging 20 lbs. In the past (only done this once), I've tried lightly smoking them and then pressure canned them. They definately had too intense of a smoke flavor. Using a Bradley smoker with the auto bisquit feed. Any tips?
Well, part of the problem is you are smoking them like white folk. You can't use a smoker like a Bradley or Little Chief and get a light smoke. They are designed to cook as well as smoke.
You need an open smokehouse with lots of space and ventilation for cold smoking.
I have a 4x4x10 smokehouse that I use for both smoking and drying. My smoke generation is done with a #10 can with holes around the bottom of it I punched with an 8d nail. I have a flat steel cover that i use to damper the smoke and regulate the burn.
The can sits on the gravel floor and I open all the vents and louvers on the smokehouse and may even crack the door a tad if there's no wind.
I use fruitwood chips in the can, either apple or cherry. Once I get the chips lit on the bottom with a torch, I cover the can and leave only a 1/4" opening.
But I also smoke mine for a day or more and they hang from 3-5 days depending on weather since I'm kippering most of the time.
For what you are doing, I would only put the smoke on them for a couple hours before taking them down and stuffing them in jars. I would also suggest using cottonwood since you probably have access to it. Use only the white wood, no bark and no heartwood.
When I can kings or any other salmon for just canned salmon, I don't put any smoke on them at all. The only thing that goes into the jar with a fish is a commercial salt pellet.