It's really up to your level of comfort, and since you are asking this question, you should ask yourself, how comfortable you are with your vehicle, and narrow mountain roads?
Take a look at it on google maps, satellite view and street view. It is narrow, less than 2 lanes, and windy. OTH - it does not get much traffic either, but it is well maintained. I've driven it in a car many times, and one day I will likely drive it in my, yet to be delivered, class B, a shorter, Hymer Aktiv.
As I said, how comfortable are you with mountain roads? I would not trust my sister from the flatlands of Indiana to drive on that road in a car! It's not a "beginner mountain road".
Also, I would not do it during a storm, our dirt mountains do tend to have mud slides. And check with: https://www.fs.usda.gov/detail/lpnf/...telprdb5347980
for road closures.
If you do choose to go, remember to share the road, pull over to let people pass, the few drivers your encounter will be very familiar with the road, and will want to go faster than you. And stop at the pull outs to take in the scenery, with no guard rails, you can't afford to take your eyes off the road.
And if you are really adventurous and want to do a free, gorgeous, primitive campground: https://www.theoutbound.com/san-fran...-prewitt-ridge
. May not want to do it in the winter, it is a dirt road. Once again check with the forest service, but it is, or was when I went, passable with 2wd, low clearance. Did it in a Prius. After writing this, I want to go back.