Here is a recipe I found its close to the one on our site. Most of the info I saw was with the skin off. I think its a mater of preference.
Smoked Salmon Candy
2-3 pounds salmon fillets
1 1/2 cups brown sugar
1/4-1/3 cup Kosher salt
1/2 tablespoon granulated garlic
1/2 tablespoon granulated onion
1/2 tablespoon white pepper
1 teaspoon cayenne pepper
1/4 cup honey or maple syrup for glazing, optional
Wood Chips