Cherry Valley and the Snoqualmie wildlife area would be closest to you. You can go to the wDFW site and click on their 'go hunt' page for access areas.
Both are also pheasant release sites, so it's really tough to decoy birds with guys walking around in blaze orange.
There really are no more close in public spots of any quality anymore. You have to drive at least an hour.5 to the Welt's area up by Bow Edison or 3hrs plus to the EWA areas.