vermilye wrote:
For a "different" part of Washington from the popular coast and cascades, check out their newly named "State Waterfall". Located in Palouse Falls State Park located about 2 hours southwest of Spokane. Dry camping that is really set up for tents, however a good size RV will fit in the overflow parking lot. If you are lucky, the host site with full hookups might be available.
More information from my visit starts here.
Palouse Falls State Park:

The road in can be quite ruff in places, but ok. Last time we were there we saw several rattlesnakes sunning themselves in the parking lot. Awesome pix though. There is a youtube video of a guy going over the falls in a kayak.