I haven't found any more on your Herman Schmidt but, I did find a lot of info for his daughter Wilhemina who married Gustav Hackenberg(Hackenberger?). His parents were Emma Hoppe & Otto Hackenberg. Emma's parents were Gustav Hoppe & Henrietta unknown. These people were all living in Jersey City, NJ 1900-1920.
If you need these census records, let me know.
Maybe tracking their descendents may help with Herman's WI ties.