i downloaded a smoked salmon recipe off one of these fishing bb's ( can't remember which one. it worked really well
It is easy!!!!

-2 cups salt (possibly more)
-1 cup brown sugar
-1 gallon water
-1 potato
-coursely ground peppercorns. (the more the spicier!) I use 2 tblspns

this is enough for 4lbs+ of fish.
put salt into the water. toss the potato into the water also. When you have enough salt the potato will float!

mix the water, brown sugar and peppercorns into the water. (dont forget to take out the potato!)
-soak in this brine overnight. After the filets have been in the fridge overnight rinse them quickly and they are ready for the smoker.
I have found applewood works really well in addition to hickory. If memory serves me, it only took about 45 minutes to one hour. You can smoke for longer. I like a smoked fish with lots of moisture.

good luck