Ironically, the turnoff had the word 'rocky' in it (lol). It's one of the last exits before you head down the mountain. I've camped a lot in the Flagstaff area, and while there are many good spots, the southern end of the Coconino National Forest can be quite rocky and lumpy.
That said, the reason I went so far on this road is that it was late, and because the two dogs I have roam a lot I have to get as far away from the highway as possible - so I just gritted my teeth and get going.
Otherwise, I would have turned around, and I think most people with an Oliver would.
I haven't had any problems with rocky roads N of Flagstaff yet. Currently I'm camping about 30 minutes north of Flagstaff off of FR 245, and the roads up here are much better, it's much cooler, and I can get well away from a major road. It's also less buggy. I miss the oaks down south but surprisingly there are aspens in this area.
I was in Hart Prairie area across the way a spectacular area - nice dirt roads - but it was just closed off because of fire danger until they get consistent monsoon rains. I'll definitely be back there at some point.