5 days before you plan to serve the turkey, remove it from the freezer and place it in the fridge on a cookie sheet.
Allow the turkey to defrost for at least 3 days.
24 hours before serving, remove the turkey from the packaging and discard the neck and giblets inside.
Remove any residual ice in the cavity.
In a bowl, combine a 50/50 mixture of dry brine seasoning and O Organics Cajun Seasoning.
Stir the mixture well to blend.
Place the turkey on a wire rack over a cookie sheet.
Season the bird all over with a heavy layer of the seasoning blend.
Sprinkle some seasoning in the cavity as well.
Place the seasoned turkey, uncovered, in the fridge for at least 12 hours and up to 18.
Preheat your Traeger grill to 325*.
Remove the turkey from the fridge.
In a measuring cup, melt the butter and then stir in the cajun seasoning.
Using a meat injector, inject the seasoned butter in 4-6 places throughout the turkey (being sure to get the breasts, thighs and drumsticks).
Season the turkey with a little more cajun seasoning.
Transfer the turkey to the grill and insert a wireless thermometer probe in the thickest part of the breast.
Close the lid and cook the turkey until the thermometer reads 160*-- about 3 hours.
Crank up the heat of the grill to 400* for the last 10 minutes of the cook to crisp up the skin.
Remove the smoked cajun turkey from the grill and place on a cutting board.
Tent loosely with foil and allow to rest at least 30 minutes.
Using a sharp heavy knife, carve the turkey, slice the breast meat and serve your smoked cajun turkey while still hot.