Direction to Keller: I think it's easier and quicker, if you start at RST (Rochester Airport) and go to 6650 Co Rd 15 SW:
Hwy 63 South of Rochester
Slightly more than a mile past (south) of airport is MN 30, run right (west).
Go 4.5 miles on MN 30
Turn right (North) on Co. 15
Go 2.5 miles. At 2 mi you'll come to the top of a hill, at the bottom is the bridge, then a house & garage on the left. About 500 ft past, on the right is the entrance to Keller.