Arizona Route 191 South of Alpine?

[MrBent]

Hey, Riders:  My wife, or pup, and I are heading out for a bikepacking tour through the high country of eastern AZ.  For those interested, here's the route--although we're doing a truncated version:

https://www.theforrestbiome.com/el-lobo-lupus.html

Our version starts and ends in Springerville and avoids a big drop to the lowest point of the route and instead does a direct connection heading south from Alpine for about 15 miles on US Hwy 191, the Coronado Trail.  Looks like zero shoulder, but it also looks like very light traffic.  Anyone with experience on this route?  Thanks!