Hwy 27, from just South of Prineville Reservoir to Hwy 20 is Oregon's only non-paved state highway. 4 years ago it was awesome hardpack dirt, now smooth high speed gravel. Should be good for motorhome travel, but I have not been on the whole route down to Hwy 20, so......good luck!!!
"got no problem with keeping truly roadless areas as wild....
On the other hand, if it has been logged or mined and roads already exist,,
...then that land should be open for public use" (peterman)