We can look on the Minnesota Official Marriage System (MOMS) at www.mncounty.com
The Minnesota Historical Society has a Minnesota Census in 1849-1905; Births; and Deaths (not complete databases)
The USA Library of Congress has a collection of old newspapers called "Chronicling America." We can check the Minnesota newspapers for a news item.
Find a Grave memorial to Hans Andreas Bardalen
buried Our Saviors Lutheran Cemetery
Dalton,** Otter Tail County, Minnesota
**(Dalton is same address listed on the 1904 manifest for Hans Bardalen):http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GSln=BA...
I did not see Clara in this same cemetery.
1910 US Census
Otter Tail County, Minnesota
Hans A Bardalen 49
Mathia Bardalen 39 (called Mattie in 1940 census)
Otter Tail County [Minnesota] Historical Society www.otchs.org