I haven't been on WarriorTalk long, so I just found this thread.
Forgive my late entrance.
The current state of WA Bujinkan as I know it:
1. Vancouver (me. Well, actually I live in Camas... which is even smaller than Vancouver)
2. Seattle (some of my students)
3. Yakima (no one left there, previously a small group of my students)
4. Olympia (Dan Klug. Never met him, but I've spoken to him once)
5. Everett (Doug Beardsley. More or less my student, currently sandan, a bit busy with work right now)
That's about it.
Don, if you come to Astoria, you're about 2 hours from the Portland OR/Vancouver, WA metro area. That's the very southern tip of WA. Currently, there aren't that many people training in the state. Seattle has a really tough time keeping an instructor. For some reason instructors sort of come and go up there. But, that might make it a prime place to set up shop. It's got a big population to draw from, and no significant instructor pool. If you moved to one of the smaller 'burbs, you could get a bit better cost of living ratio, too.
As far as doing a seminar... it might be tough, because like I said, there aren't that many people training. When we bring Bill Atkins out (every 10 weeks) we struggle to get 25 people. That's scary when you consider we only charge $65 for the WHOLE weekend. That's in Vancouver, so we get the Seattle market, the Portland market, the local vancouver pool, and frequently we get a few stragglers from Idaho, Utah, and even Denver.
Good luck. Let me know if I can help you out.
aric