I have friends who have made the more than 15-hour trip, but I am concerned that my vehicle is unreliable.  The airline fare is about $300 round trip. 

Got a video for the road between here and Salt Lake City.  I have driven most of that route before, but it's been awhile.
https://www.youtube.com/watch?v=ZhtXX4a3SoM

Trippy has a summary for a drive. I have never been through southwest Idaho.
https://www.trippy.com/drive/Portland-to-Grand-Junction