Any prime rib advice?

Going to smoke a Prime rib on Christmas Eve this year based on this Alton Brown recipe:

https://altonbrown.com/recipes/holiday-standing-rib-roast/

Any tips on adjusting it for the Joe?

Main questions:

1. Is 250 a good temp? I was initially thinking 225/35

2. Any recommendations for catching drippings while avoiding them just cooking on the heat deflector?

3. After resting – should I do the high temp right in the joe? I have a propane grill I could sear with as well