Best Road for 38 ft RV & tow to Rt 101 from I-5

Thanks for all input. We finally took 299 and for anyone considering it, really had no problem and can recommend it. We took our time, slowed at curves, pulled off and thoroughly enjoyed the views. Like so many of the mountain roads/secondary roads, use your head and be careful. Linda (38 ft Adventurer w/CRV tow)