For the trip home, I have found an E85 station just north of New Ulm:
http://e85vehicles.com/e85-stations/e85-minnesota.html
Farmers Coop, Klossner, Minnesota
40399 State Highway 15, Klossner, Minnesota
Those who absolutely need E85 should call to verify they still sell it, and will be open on Sunday; if you do call, please report back.