Fort Casey State Park
Fort Casey was built at the turn of the 19th century as one of three forts designed to guard the entrance to Puget Sound in case of attack. (Fort Worden on the Olympic Peninsula and Fort Flagler on Marrowstone are the others). The Coast Artillery Corps forts were never engaged, and the site became part of a state park in the 1950s. While in Fort Casey State Park, visit the Admiralty Head Lighthouse, explore the gun batteries, take a walk on the beach, or hike one of the upland trails. Reservations are not taken for campsites.  Fort Casey is located on State Highway 20, three miles South of Coupeville.
Phone   (360) 678-4519

Fort Ebey State Park
Fort Ebey was built in 1942 as part of the United State's Pacific defense. In 1968, the army donated the site to the state, and it was opened as a state park in 1981 — one of many military properties in the Puget Sound area that have been converted to recreational use. While at Fort Ebey State Park, enjoy a walk to Lake Pondilla; visit the beach; hike along the bluff tops and enjoy views across the Strait of Juan de Fuca. Also explore the abandoned bunker and gun emplacement.
Phone: 888-226-7688
Camping Reservations: online or 1-800-452-5687
More Info: Here

Rhododendron County Park
Rhododendron County Park offers tent & RV camping on a first come first served basis at 502 W Patmore Rd in Coupeville. 
Phone: 360-679-7331