A much more stressful bridge to ride on this route is the bridge over Coos Bay further south in Oregon. It is steep, long and windy. And the locals do not seem to appreciate cyclists holding them up. A much better idea is offered by Steve Greene, who lives north of the bridge. He has posted an article on the CGOAB site that shows how to bypass this bridge and the towns of North Bend and Coos Bay. http://www.crazyguyonabike.com/doc/?o=1&doc_id=12467&v=2h
I would recommend using his route. Both the book and the ACA maps have you going over the bridge and then taking the Seven Devils Road Scenic Route to eventually link back up with Hwy 101. The bridge was just scary and the route was quite steep in parts and definitely not scenic unless you like logging operations.