Are you familiar with Find A Grave? Margaret O'Daniel has been placed on it here:
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=82...Also be sure to check out the Washington State Digital Archives here:
http://www.digitalarchives.wa.gov/HomeWhich is where I found these:
Record Series: Marriage Records
Collection: Stevens Marriage Records
County: Stevens
Reference Number: stevenscomcvol6_00173-DA2
Groom's Name: Charles Dubois
Bride's Name: Aileen O'Daniel
Marriage Date: 07-12-1933
Record Series: Marriage Records
Collection: Chelan Marriage Records
County: Chelan
Reference Number: cechemarcert0016345
Document: 16943
Bride's Name: Joan O'Daniel
Groom's Name: Richard W. McRae
Marriage Date: 5/6/1955 12:00:00 AM
County: Chelan
Record Series: Marriage Certificate
Repository: Central Branch
Access Number: CE304-2-14
Key: 84244
This might be the husband of Aileen:
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=42...And be sure to thoroughly search the earlier site I gave you for obits, as it lists burials, etc. too. Good luck