Walnut Canyon National Monument,
Sunset Crater National Monument, and
Wupatki National Monument near Flagstaff are definitely worth visiting. However; in my opinion for Sedona and the surrounding area, there are a lot of better places in the Camp Verde/Cottonwood area including
Dead Horse Ranch State Park that would make it easier to visit the attractions in that area. Some of those attractions are:
Montezuma Castle and Montezuma Well National Monuments,
Tuzigoot National Monument,
Palatki and Honaki Ruins,
V-Bar-V Heritage Site,
Verde Canyon Railroad,
Cathedral Rock,
Schnebly Hill Road, and
the town of Jerome.
Hope you have a Great Time!!