Keith--- I just found a cool website: www.Trails.com At the website you can specify "off-highway" (off-road) trails, and it will show an aerial view of WA & OR with various "icons" for different off-highway trails.
After a very quick search, I found one that may be of interest and somewhat centrally located to VX'ers in both WA & OR. It is "MARBLE MOUNTAINS" (Cougar, WA). Take I-5 Exit #21 (Woodland, WA - last chance for gas) to WA-503 (East) to Nf-90 (East) to Nf-25 (North) to Nf-25 (West - to moutain top dead-end/turn around point). According to the website, it's a 10.8 mile off-road venture with moderate degree of difficulty for 4WD's (pretty easy). The forest road is nestled inbetween Mt. St. Helens & Mt. Adams with spectacular views. Just an example for ya'.
Wherever we decide to go for our 1-day outing, it should be fairly close to a major freeway like I-5 (preferably) or I-84 or major connecting highway, etc. This will allow people to get home in a timely manner afterwards (very important). "Sunday's" would work best for me (I can't make any Saturday due to work).