*Sigh* At least you're in the right state. I'm in Florida, but a couple years ago we were in MN and tried our hand at it. Found tiny ones at the lakeshore, found a golf ball sized one by the side of a dirt road, where it had been graded. Have heard that a great place to look is in plowed fields after a rain, and before spring planting. Also, every July, they dump agate filled gravel on the street of Moose Lake for their Agate Stampede. (also, you can download a permit to look in the local gravel pits, which we did, but we didn't find much.) If I lived there, I would make friends with a farmer!