If you are driving east on I-40 from Vegas to Flagstaff, you will be going through Williams, AZ. A great place to stop and stretch your legs while looking at all the old buildings with Rte 66 decor and a small quilt shop call Quilts on Route 66. You can get tickets for a train ride to the Grand Canyon that I hear is quite scenic.
We stayed 2 nights there in a campground. Hubby was sick at the time so I just walked the downtown area.
Link to quilt shop:
https://quiltsonroute66.com/