I did a 9lb Standing rip roast from Caputo's on my Masterbuilt smoker on Sunday. The roast was $5.99lb, and was very good.
I have done many a prime rib, and did a fair amount of research on cooking methods. There is a good write up on Seriouseats.com that covers the cooking method.
My way is to prep the roast how you like... Olive oil, salt pepper, a little garlic, etc. Roast at 200 degrees F. I used Apple wood chips with just a hint of mesquite. When the probe hit 123F, I pulled the roast from the smoker, and blasted it at 475F in the convection oven for about 10 minutes to crisp the top. Rest for about 30 minutes, the temp will be about 130, for a perfect Medium Rare throughout the roast. Smoker time was about 5 hours at 200F.
I had tried the blast heat at the beginning, but the serious eats write up had the science behind the reason to use high heat at the end vs. the beginning. It really does produce awesome results.
The roast very tasty with just a enough of the smoke for some extra flavor. We made shave prime rib sandwiches with Horseradish Whipped cream spread. Yum!