My wife and I cycled a big portion of this some years ago, although we came in via Rt. 3 from Weaverville/Hayfork. From where 3 hits 36 to the coast was truly fantastic. I don't know about current logging activity, but at the time--about 7 yrs ago--it wasn't too bad. Expect little traffic but challenging riding--one big pass after another. Not many services. We did find a burger joint/cafe in Mad River but have no idea if it still exists. This is a two lane road, no shoulders to speak of, but light traffic compensates. The route can be bloody hot in the summer. We did it early June and had pretty good conditions. The road you want to avoid is 299, which seems to be the main east/west line in that part of the state--lots of traffic, trucks, nasty.
Have a great ride!