(3) gravel sections, days 1, 5 and 6. I'm not sweating the washboard much as I'll bring along fat tires and swap them in on those three days. I will also have better downhill control than most using a big fixed gear.

An aside - the county I live in, Washington Co., OR has many steep gravel descents with wild washboard at the bottom; enough that I had the old frame I picked up that rode so well on bad roads stripped and checked out by local framebuilder. Those washboards felt like they were designed specifically to break frames.

And back to Cycle Oregon - they take real care not to send riders into dangerous situations. Often very poor roads have been upgraded before we arrive and when it cannot be avoided, they have established pull-offs, etc. or staggered riders so we would survive intact.

Ben