Don't use a smoker to make jerky. The meat absorbs too much smoke and its bitter.
Use a dehydrator and make a 50-50 mix of soy sauce and teriyaki sauce with a little Worcestershire. Marinate the meat for an hour or two, no longer.
Lay the strips on the trays, then sprinkle with what ever spice appeals to you.
We use garlic powder, onion powder, cayenne pepper. Never use salt. The soy has plenty.