You have to make an account with them before you can see the map. That is a bummer about the logging trucks. I live and ride a couple hundred miles west of that area and the logging trucks are awesome. They're the most courteous people on the road. I can't wait to do this route, or at least part of it. I can't start until early November next fall.
I have generally found logging truck drivers to be competent professionals on the roads I have shared with them and have always much preferred them to rental motor homes. Some times logging trucks passed close, but at least I trusted them to know how close they were passing. Rental motor homes on the other hand were often driven by folks without a clue. That said I have not ridden the road in question and for what it is worth have heard widely varying opinions on it. The have ranged from MrBent's "horrific" to a friends who grew up there's comment that "Its OK, but yeah there are logging trucks". Our plan thus far is to follow the route unless we get there and find it unbearable.