Thanx for the replies and the interest in the trip from some of you. If you guys are serious, I'm planning to do the ride in mid June, but that's flexible. I've already made my return arrangements--a friend is meeting me in 'Frisco and we're heading over to climb Shasta before driving back home to Seattle. Hey, if we had like three or four riders, we could do the thing very cheaply as a "credit card tour." One person would buy a crappy motel room every night on a rotational basis and the others would pile in, sleeping on the floor or wherever--beats a tent. anyway, just a thought. The idea of going self-supported is purer, I suppose, but then you have to consider the extra weight, etc.
Anyway, my pace will average around 100 miles per day, sometimes slightly more, sometimes less, with plans for one or two rest days en route if i find a place worthy of extended exploration and need the day off. If this sounds like your kind of adventure, let me know. Also, if you live anywhwere around Seattle and want to hook up for some training rides, let's do it.
Thankx again for the useful info from all the posters.