I had to try salmon this way. I got a farm raised salmon fillet. I put a sprinkle of a citrus blend spice I have then a few sprigs of dill and topped that off with slices of lemon and covered the works in fresh ground pepper.
I grilled this fish (sorry) on my charcoal kettle. My temp was around 300F. I used cedar shingles my old man had left from his shed. Kept most of it in the indirect heat but allowed a corner to smolder (I know soft wood is bad for smoking) and the small amount of smoke gave a wonderful sweet flavor. The planks were soaked for 1 day then I sprinkled it with my citrus blend and wrapped in saran over night (not sure if it helped but...) Here is the finished product.
Thanks for checking out my fish. It was fantastic and I will be doing it again.