I tend to agree with Paul,
It's a nice (but slow) drive in a car or truck, but I am not sure if I would go that way with my travel trailer or not. I guess if I was not in a hurry, and wanted to camp along the way, I might consider it. Otherwise, I would just head west to hwy 222 in the valley and cut north that way.
The road is one lane in places and isn't very fast. But since it was built for logging trucks, there is "enough" room. It is paved most of the way. I believe there is a bit of a climb out of the N. Fk. Middle Fk Willamette River canyon. There are some nice camping spots at the upper (southern) end of Cougar Res. and also not too far out of Westfir (along the river).
Have fun,
Steve