Well...if you happen to be out in western Washington I'd suggest Deception Pass State Park right on the water..

http://www.parks.wa.gov/parkpage.asp?se ... s&pageno=1
If you're in Washington on the Olympic Peninsula be sure to check out Port Townsand......there's a very neat waterfront RV campground with a great view out into Puget Sound.
Chamber of Commerce http://www.ptchamber.org
Or another State Park with waterfront camping at Port Townsand, Fort Warden
http://www.parks.wa.gov/fortworden/

