Have you checked here for some past posts? There are some great ways to smoke fish in posts less then a year old.
I like to let my fish (salmon or trout) marinate in the brine for 24 to 36 hr. The brine is make of 500ML soy, 1L water, 100/150LM Sweet chili thai and a few hot pepers. When smoking the meat, I put the pepers on top too. Keep a spary bottle handy with some of the brine in it (just after you make it not after the fish has been in it) to spray the meat to keep it moist. Good luck and post pic's as to how you made out.
Geoff