Have done 87 from Phoenix to Winslow - loved the drive but it took some time. Two lane and some very slow winding climbs. The road to Holbrook will be 2 lane and relatively slow compared to the interstate. We just came back from a trip and used I-17 from Phoenix then I-40 (you do not go through Flagstaff, the interchange is south of the city) because the drive was easier and faster.
Greg and Karen, the pups Bailey and Lily (St. Bernard mix and Beagle mix) and Lola (the attack cat)