In June of this year, my wife and I are leaving from Portland, Or to head south along the Pacific Coast Route to San Fran. I bought the book "Bicycling the Pacific Coast Route" and it is a wealth of info. However, in reading the sections on Northern California, there are SEVERAL mentions about how busy the road is, the logging trucks, heavy traffic, big campers, etc... Is it really that bad? Can anyone shed more light on this for me? My wife is not a big fan of busy roads unless the shoulder is wide, but the book says that in a lot of places, the shoulder doesn't exist. Any info would be greatly appreciated.