I'm using the smoker to both cook it and add the smoke flavor. In this case I used a white oak. Smoked it at 220 deg for 4 hours to get the internal temp to about 124 deg and then pulled it out to rest it. Then I put it in the oven at 500 deg for about 5 minutes to crispen up the fat cap on top.Smoked prime rib? I don't know whether to consider this blasphemy or a great idea. When you say "smoked" are you using your smoker in a traditional sense, with mesquite, pecan or hickory to add flavor or are you using it primarily as an oven?
It's basically prime rib with that classic smoked flavor on the outer bites. At 220 deg fro only 4 hours the smoke flavor isn't going to penetrate deep into the meat. In fact, it barely gets a smoke ring., but that smoke flavoring on the outer bites is phenomenal.