Preheat the Smoker: Fire up your preferred smoker and preheat it to 225°F, using Oak or Hickory wood for smoking.
Trim and Season: Combine olive oil, Worcestershire sauce, minced garlic, Blak BBQ Seasoning, and Texas Beef BBQ Rub in a small bowl. Rub the prime rib roast generously with the combined seasoning mixture evenly over the entire roast.
Smoke the Roast: Place the seasoned prime rib on the smoker's grill grates. Close the lid and smoke the meat until it reaches an internal temperature of 120°F for Rare, 125°F for Medium Rare, or 130°F for Medium. The roast will take roughly 35-40 minutes per pund to reach the desired temperature.
Rest the Roast: Once the desired internal temperature is reached, take the roast off the smoker and transfer it to a cutting board. Cover the roast loosely with aluminum foil and let it rest for about 20 minutes. Meanwhile, increase the temperature of your grill to 400°F.
Sear the Roast: Once the smoker reaches 400°F, return the rested prime rib roast to the smoker. Continue smoking until it reaches your preferred doneness: 130°F for Rare, 135°F for Medium Rare, or 140°F for Medium.
Rest and Serve: Remove the prime rib from the smoker and allow it to rest for an additional 15 minutes before slicing and serving.