John,
I have been hot smoking for years here on the island. I always smoke at 190 degrees and use two pieces of red bay wood, it will not be in the Cookshack long enough to get enough smoke with just one piece. If using hickory then one piece will be fine. We use white or red bay here and use nothing but salt and black or red pepper as a rub.
About two hours into the hot smoke, with a fork, check to see if the flesh is flaky near the bone at the thickest part of the fish. Adjust your time by guess and re-check again. If we are making fish dip then we want the flesh soft. If we want to eat the fish from the skin and scales we smoke it until the meat is almost dry. Yes! we smoke our fish with the scales on - it never sticks to the grills that way.
Cold smoking which requires a cure, is another animal and is not my favorite method of smoking fish. Mullet is our smoked fish of choice, but we smoke grouper, Spanish mackerel, triple tail, red fish, and a few other fish, but never smoke sea trout or spotted weak fish. Sea trout is so soft it just doesn't smoke well, giving a gummy texture when finished. However sea trout and spotted weak fish is wonderful fried.
smokemullet