In doing research on my Jahsman, Fuhs ancestors, I came across a marriage notice for Joseph Regenfuss of Conover, Vilas Co., WI in the Appleton Post Crescent dated Sept 12, 1938. He married Mrs. Mabel (nee Laahs) Carter in Eagle River, WI. The couple took a motor trip through northern WI and MN. Upon their return, they will live at Twin Lakes, where Mr. Regenfuss is associated with his father in the operation of Twin Haven resort, near Conover in northern WI.
Also from the Appleton Post Crescent on April 18, 1939: Twin daughters were born to Joseph and Mabel Regenfuss at the Clintonville Hospital on april 16, 1939.
I don't have much more information, but hope this helps.