Go up 31 to 25 at Rochester and take 25 to Warsaw. The trick is to get off 25 at the right place and you can come in the back way and avoid most of Warsaw.
I will leave it to a local to explain where to turn off 25. Zimmer Road I think.
This is good advice. US 31 north to SR 25 (Rochester). Take SR 25 north and at 3rd stop light turn right (Couthouse is on the north east corner of intersection) follow SR25/SR14 east to second stop light (Sheppards Chevy dealership on north west corner of intersection) turn left and follow SR25 north approx. 20 to 25 miles. when you come to the 4 way stop of SR25/Winona Ave/Crystal Lake RD/ Zimmer Rd. proceed straight through intersection on Zimmer Rd til road T's. At T turn right on to Lake St.(Old Road 30) to Round-a-bout to Fox Farm Rd, North on Fox Farm Rd to CR 150 West. Turn Left on CR 150 W and we're approx. 1/4 mile on the left, Sign is out by the road. Across from the gravel pit.