There is a few tight spots on 101 in Oregon. Probably the worst is going to be south of Yachats for about 15 miles. Curvy, narrow and beautiful. Keep your eyes open and watch for bicycles. They always show up at the worst time.
There is a few tunnels that you will find that are marked with low clearances ON THE SHOULDER. Maintain your lane position and you will be fine, watch for the oncoming panicked drivers hugging or crossing the centerline.
2016 Bounder 34T Anniversary Edition