Have you tried the Washington State library to find an obituary for you? Since you have dates of death, they will probably be able to help you. http://www.sos.wa.gov/library/ask_form.aspxhttp://www.sos.wa.gov/library/ask_form.aspx
Also have you ever tried Random Acts of Genealogical Kindness - raogk.org
They have many volunteers throughout the states.
I noticed on Harvey's wedding certificate to Lulu (Lula) Rice, that it was her second marriage. It looked like she signed her name as Lula.
Also I found this. I have no idea if it is your Lulu: Groom Last Name: BALDWIN Groom First Name: John M. Groom Residence: Bride Last Name: HOOD Bride First Name: Lulu V. Bride Residence: Place: Kooskia Date: 15 Jun 1924 County of Record: Idaho State: Idaho Volume: 3 Page: 503