Hi, are you still wanting information about your grandparents? Do you want volunteers to help find records? Or are you only interested in hearing from people who knew them personally?
from Minnesota Historical Society Death Records
TRASK, MAUDE A Date of Birth:07 Jun 1896 Place of Birth:MINNESOTA Mother Maiden Name:HOLSTER certid# 1985-MN-012889 Date of Death:31 May 1985 County of Death: HENNEPIN
TRASK, WILLIAM F. Date of Birth: 28 Jan 1893 Place of Birth: OUT OF STATE Mother Maiden Name: UNKNOWN certid# 1975-MN-032337 Date of Death: 30 Dec 1975 County of Death: HENNEPIN
The discrepancy of one year for William's birth is common; this is clearly him. Death records can be ordered and they contain information not transcribed in the online database.
Their marriage is not listed in Minnesota Online Marriage System (MOMs) - lots of marriages aren't. Ramsey County is not included yet - and that may be where they married.
There are no Trask children born in Minnesota with a mother with maiden name Chase (or mother maiden name not listed), on the Minnesota Historical Society website. I did not use Soundex search - just TRASK. www.mnhs.org
There's a Maude Chase age 9, born in Minnesota, living in St. Paul, Ramsey County in 1905 Minnesota census.