89A From Cottonwood to Prescott:Not Advised, very tight turns.
89A From Cottonwood to Sedona: Ok
89A From Sedona to Flagstaff: Not Advised, steep, tight turns.
Schnebly Hill Road from Sedona to I-17:Not Advised, dirt, narrow, no guardrails
RV's should take 179 from Sedona to I-17.
The only decent RV park in Sedona is Rancho Sedona. It's nice and well run. It is on Schnebly hill rd but only 1/4 mile off 179 on a short section which is paved.
There are also decent RV parks near Cottonwood or on I-17 at Camp Verde such as Distant Drums.
