Mike,
Don't listen to Disco!! What does he know?? LOL Heck, I learned a lot from him.
If you are smoking Salmon for an appetizer (finger food), and if they are filet size pieces, I typically brine in a Sugar/Salt dry brine for 8 hours. Rinse and dry for 2+ hours. Then for smoking, I start at 125* for first hours, then bump to 135 for 2nd hour, then bump to 140-145 for 3rd plus hour til an IT of 145* is met.
There are tons of very nice recipes out there. The above is very simple and is my go to.......