It's a longer drive than most of the other CM's I've gone to (except maybe Victoria, but that was at the end of an around-the-Olympic-Peninsula vacation), but there's several caches I plan to hit along the way to break up the drive. The one I'm looking forward to the most is I-90, Wild Stallions Ride Again (pictured), which you've probably seen if you've driven I-90 eastbound across the Columbia.
I'll be heading out early Friday. My preliminary route plan shows me leaving at 6:30 a.m. and arriving at 5:00 p.m. (planning for 10 minutes per cache), but that's pretty flexible, particularly since I don't plan on leaving until 8:30 or so.
Saturday will be a sun-up to sun-down mass mob cache hunt. I'm meeting up with a couple cachers and will be their navigator. I've got the official Spokane Cache Machine route ready to print, but I like Microsoft MapPoint a lot more, so I'll be spending time this week copying the waypoints over and re-creating the route.
This is the first cache machine event I've attended that I didn't organize. I planned one in Spokane before, back in September 2003, but didn't attend due to a house fire. I'm looking forward to this a lot.