Are you trying to get actual smoked salmon or just cooked salmon with a smoke flavor? Whole salmon do not do well for smoked, if it's smoked that you want, do as recommended above, filet, slice into 4-6" pieces, brine, rinse, dry for several hours on a rack and smoke at low temperature for 3-5 hours. For cooked salmon, I'd still split into two slabs and remove the bones, baste with a mixture of butter, minced garlic, lemon juice, brown sugar and a splash of orange juice, cook slabs skin down on frog mats at low temp. to an IT of 125-130°, do not over cook. This may sound like a low IT, but take it from a 50+ year salmon fisherman, this is the right IT.