I dry brine my Salmon, and usually only do 3 pound batches. (Because it comes from Sam's Club in a 3 pound bag.)
I brine overnight in the fridge.
1 cuppa Kosher Salt, 4 cuppa brown sugar.
*
Rinse, dry, pelical, smoke 6 hours, using
Bears Steps for temperature ramp up.
I can also recommend Bears recipe for smoked salmon.
* This is a very old way to cure Salmon, or about any fish. Very basic, and I like it for very basic Sm00ked Salmon for my
Salmon Dip/Spread.
After it has cooled, I vacuum bag it with a sprinkle of Parsley flakes for use later and freeze. I also put my smoked, repackaged, salmon back in its original bag so I know when I done it.
Herb Good is where I gathered this method of dry brining.
(You can see I'm old school by my Blue, underlined Links I share.) :rolleyes:;)
I would do batches if I had 30 pounds of Salmon. Say 5 pound piles? That way you could try different recipes to find one you love.