I did some research on Harold Lee Klepper b. 31 Mar 1898 Lebanon, OR d. 08 Mar 1971. I could only find a record of three wives: 1) 07 Nov 1917 Multnomah County, OR = Annie Minerva Davis 2) 19 Oct 1932 Clark County, WA = Jessie Mae Clark 3) Irene Blanche unknown last name (23 Jun 1928-06 Sep 2005). She is buried with Harold in Willamtte National Cemetery.
I did find a marriage record for La Mont Klepper (b. 05 Nov 1937) who was married to a Barbara Shrum (b. 01 Dec 1940) who were married 18 Apr 1959 in Stevenson, Skamania, WA. The names were similar but don't match the data of birth of your Barbara A. Shrum (b. Abt 1922 MA).
I also found a marriage record for your Barbara Shrum who was married to Vernon R. Gilbert in 27 Dec 1941 in Vancouver, WA. According to Barbara mother's obituary: COLEMAN - Gladys H.; mother of Mrs. Vernon R. (Barbara) Gilbert of Portland (29 Jan 1985) they were still married.
Also see the obituary of Vernon Richard Gilbet: A service will be at 2:30 p.m. Friday, June 22, 2007, in Willamette National Cemetery for Vernon Richard Gilbert, who died May 26 at age 89. Mr. Gilbert was born June 17, 1917, in Carstairs, Alberta, and immigrated to Portland in 1919. He graduated from Benson Polytechnic High School. During World War II, he served in the Navy in the Pacific. He was a purchasing agent for Alcoa for 35 years. In 1941, he married Barbara A. Shrum. Survivors include his wife; sons, James and Donald; and three grandchildren. Arrangements by Riverview Abbey.
Thus, I have to conclude that Barbara Shrum was never married to Harold Klepper.