Very cool, I bow down to your Cat-1 history accomplishments, seriously. Gotcha on the stop for a pee-thing, I guess that's where MTB has the advantage, there is always a tree nearby.
Speaking of the Cascades, one of the guys I am doing the 24 Hours of Adrenaline with also did the Creampuff 100 last year; said it was a tough race. I haven't done any racing in the US but the Creampuff 100 sounds pretty interesting (though it would probably crush me). One of the tougher rides I did was the Road to the Sun loop in Montana, unsupported in a single day, just me and another buddy and all the spare gear we could cram into fanny-packs. 245kms, a wicked headwind and the Continental Divide a couple of times made for a long day. At one point we were lying on the side of the road, in the gravel, laughing about nothing, just really exhausted while eating bananas. I recommend that ride to anyone though, it is a classic beautiful ride.
I just took a quick look at the RAW ride, it looks fantastic. Nice to have a strong bike organization like that, no doubt you will have a good time if the weather holds. And hey, what do you mean there won't be any good coffee, it looks like one of the sponsors is Starbucks.
