Also Camano Island SP and as mentioned Ft. Casey SP. Our favorite is Ft. Ebey SP mainly because of the dramatic views of Strait of Juan de Fuca from the bluff trail. Deception Pass SP is the busiest in the state. For July get going on reservations for all these places now, but for most of these SP's except for Deception Pass and Ft. Casey, you might luck out in midweek with just driving in and finding a site for a couple of days at a time. Another excellent campground park is Kayak Pt. County Park on Pt. Susan Bay south of Stanwood - run by Snohomish County Park Department.