re: Any suggestions for someone doing a Prime Rib for first time

Trim (reserve all trimmings), then salt a day or two before you plan on cooking.
Salt and pepper ONLY about an hour before cooking.
Smoker at 225. put a pan of 1/2 red wine and 1/2 water with all of the trimmings under the grate. Make sure to keep the pan full of liquid for the entire smoke.
Cook until 120 in the center (cook to temp, NOT TIME)
Turn on broiler or gas grill as hot as it will get. Sear the outside.
Let sit for 30 minutes.
While resting strain the drippings pan and put the liquid in the freezer for about 10 minutes or until the fat starts to solidify on top. Once that happens you can scrape the fat off and put back into a pan for heating/reducing.
Slice and eat.

Best prime rib I've ever eaten I cooked this way for Thanksgiving.