Remove pin bones from salmon using tweezers.
Mix kosher salt, brown sugar, and black pepper to create dry brine.
Line dish with plastic wrap, add thin layer of brine mixture.
Place salmon skin-side down on brine layer, cover flesh completely with remaining brine.
Wrap tightly, refrigerate 8-12 hours.
Rinse salmon thoroughly under cold water.
Pat dry completely with paper towels.
Place on wire rack skin-side down, refrigerate uncovered 2-3 hours until tacky.
Preheat smoker to 175°F (80°C).
Soak wood chips 30 minutes, drain.
Place salmon skin-side down in smoker, add wood chips.
Smoke 3-4 hours until internal temperature reaches 145°F (63°C).
Remove, cool completely before slicing thinly against grain.