Yes, I plan to use US 50 on my return west because I-40 scared about 10 years off my life!
You’re on my prayer list so I figure no matter what, you’ll be safe wherever you’re driving. ;o]
I’ve drive US50 from Dodge City, KS across to Sacramento, CA. It’s a scenic drive, but it’s two-lanes most all the way, so there’s always folks itching to pass, and it gets awfully remote in some places.
You might consider going up to St. Lou and taking I-70 if interstate speeds aren’t an issue. Set the Cruise Control to match the truckers and it’s almost like you’re standing still. Just pick a rig, match its speed, and keep far enough back that you can see the driver’s side mirror.
I-70 goes all the way across to I-15 about 120mi south of Provo. Plus, US50 and I-70 are one and the same all the way to there from Grand Junction, CO.
Once you hit I-15, you’ll be in pretty familiar environs.