In a large bowl, place wood chips and enough water to cover. Let soak for at least 30 minutes. Drain well. Place wood chips in an even layer in a roasting pan. Top with a wire rack; spray with cooking spray.
In a small bowl, stir together zest, ¼ teaspoon salt, and ¼ teaspoon pepper. Season catfish with salt mixture, and place on prepared rack.
Place center of roasting pan over a large stove burner; heat over high heat until chips begin to smoke. Cover tightly with foil; reduce heat to low, and cook for 30 minutes. Turn off heat, and let cool for 30 minutes. Using 2 forks, shred catfish.
In a medium bowl, combine smoked catfish, cream cheese, dill, parsley, lemon juice, remaining ¼ teaspoon salt, and remaining ¼ teaspoon pepper. Garnish with dill, zest, and lemon wedges, if desired. Serve with crackers, cucumber, and bell pepper.
Recipe by Taste of the South at https://www.tasteofthesouthmagazine.com/smoked-catfish-dip/