On the section of the route from Prescott to Clarkdale phones will be intermittent. You will be quite high coming down into Clarkdale and when there is a clear shot to a tower you'll have reception. When you're not, nothing. The route over the mountain is steep and has a large number of close switchbacks. The state has restricted it to NO TRUCKS OVER 50' in length, but there is no restriction on RV's regardless of length. I have driven it in a 38' Diesel Bounder, southwest to northeast, pulling a toad. It was tight, especially on the switchbacks and through Jerome, but if you are a good mountain driver, and your equipment can handle the grades, it is not a major problem. The same general issues will be seen on the section of the route from Sedona northeast. This is the section with steep cliffs right at the road edge that will reach out and touch you if you're not careful. Switchbacks, steep grades and narrow spots are the same as the other section. When you finally get up out of Oak Creek Canyon and onto the mesa, it's a very pretty ride. Same truck length restriction. The stretch of 89A between Clarkdale and Sedona is no problem at all, except for possible traffic and road construction issues st some times.
