Death ValleyCA->Chicago: sights? boondocking. in April.

Four corners would be backtracking west from Albuquerque. Vendors and a marker that's not exactly in the right place (so I've read). Not worth the detour IMO.

If you do go up I-25, you can catch US36 out of Denver. That was also suggested to me last year.

I forgot to note that it's important to keep an eye on the weather. The higher elevations in Northern AZ, etc. could get an occasional spring snowstorm. I just looked at Potato Patch Campground (from my previous post) website and it doesn't even open until May 1.