I believe I have found Luella on the 1920 census. She is in Casper, Natrona County, Wyoming. The census is not very clear. they have the last name as Schwerdt. However, if you look at it closely, I think you will se that it is Schroeder.
Schroder, Arnold (?) W M 67 Germany
Bell W F 44 Texas
Hiram W WM 16 South Dakota
This is coupled with the marriage of a Belle Warden to Otto Schroedter in Deadwood, Lawrence County, S.D., 14 September 1916.
Hiram Clay Worden and his family are in Washington State in 1930.