Unlike reenacting on the east coast, west coast CW reenacting has its own flavor. Most WC groups belong to a umbrella group that cover both sides of the conflict, plus ancillary groups. It's a concept that is used in east coast WW2 reenacting.
One such group is the Washington Civil War Association. Their mission statement is as follows:
The Washington Civil War Association is committed to honoring our ancestors, both North and South, who fought in or lived during the American Civil War. To this end the WCWA will sponsor Living History Encampments, Battle Reenactments, School Programs and Recruiting drives throughout the State of Washington.