Several years ago a friend of ours bought some property in Sedona with the intention of building a house. He never did. We were traveling to the Grand Canyon without a towed vehicle (renting a car when we needed - not a good idea in retrospect) and he asked us to stop by and give him some ideas on the place. Rather than going back south to 17 and then north to Flagstaff the simple route appeared to be 89A. We were in a 36 foot DP w/o a towed. There were some switchbacks that had me nervous from the lack of rails or barriers. Problem was, no place to turn around had I wanted to.
All that said, it is doable but it is not any fun nor time to sight see.