I have a photograph of Elmer's headstone that is shared with Ruth. The photo was taken taken Elmer's death but before Ruth died---so it only shows her birthdate of Feb 24, 1894. This is the same date you reported from the CA death index so I think this confirms that her middle name was Blanche (not Bertha) as you suggested. I'll add this to my records and I thank you.
I'll also have to recheck the information about Elmer's marriage. It has been over 10 years since I have done Creekpaum research and can't, at the moment, put my finger on the source I used.
Although Elmer was my uncle, I never met him and my mother (his sister)did not have a close relation with him. She did not know of any other marriage other than Ruth----but it is possible.