Amazing smoked trout? Super easy.
Get a plastic bin of some sort, and dump in 2 liters of water, 2 pounds of brown sugar, a cup of salt and a cup of real maple syrup (not the aunt jemima shit.)
starting along the back of the filet, cut it into strips about a half inch thick, running from the neck to the tail. put the strips in the brine for a day, refrigerated.
pull it out, rinse it, pat it dry, and if you want, crack some pepper over the the pieces.
put it in the smoker, the key factor being this: flesh on the rack. if you put the skin down, the smoke doesn't do as good a job.
use whatever type of wood you like. i'm currently toying with apple, cherry and sugar maple mixed. i use lots of wood, but your method may vary.
get an empty spray bottle and fill it halfway with maple syrup, maybe a bit of honey (not critical, but cool if you've got some) and top it off with water. spray the fish with this while it's in the smoker. every half hour to an hour.
i usually do it for 8-10 hours at 130. you can cut it short if you want a more moist fish, and do it longer if you want a drier one.