Hi Dave, send an EMAIL to AskALibrarian@secstate.wa.gov with his name, when and where he died. They will search the newspaper microfilm for 30 minutes at no charge & reply with what they find.
Hopefully they will find an obit because it should contain info about where he was buried & his family. If they don't find one, post again and a volunteer might be able to find more info for you. Successful Hunting!