We took a Hummer tour up Schnebly Hill Road from Sedona to the Schnebly Hill Vista. We've taken this route many times on our own, but it was nice to have a tour guide. A four wheel drive vehicle with high clearance is required to reach the vista from Sedona, but you can get there from Interstate 17 with a regular car. Next time we hire a 4x4 tour, we'll go some place we can't go on our own.
It can be a bumpy ride.