I'm in ICT. Tuttle is always a nice drive since you can pick either Highway or the Country Highways to take the scenic route.
KS rocks is nice too, especially with all the picnic areas they have. BUT check their website before you head out there because they close the park for some private events.
One of my Fraternity Brothers owns the Badlands ORV near Ark City, but it is only ATV's now. Plus Mud runs every once in a while. They are planning on opening it to Full ORV's, but they're doing it in stages from what I can tell.
When KK rolls around in September I know the group I wheel with is going and usually have a few spur of the moment trips during the cold season.
What part of the NW are you in? My little brother just got back to Bremerton and is finishing up on his Dolphins. If you are planning on selling your car up in that area he might make a good offer if it's a post car.