Here's how I find fields or any other location without a physical street address. When getting to the college fields, this method was fantastic. The GPS will take you right into the parking lot - no address needed!
Open Google maps and find the field - click on the satellite view icon in the upper right portion of the map.
Now, in the upper right area of the window (above the satellite view icon) click on the "gear" icon, which opens an options dropdown - click on Maps Labs in the menu.
Scroll down in the window that opens and enable "LatLng Marker". Scroll to bottom of the window and click the Save Changes button.
Back on your map, zoom in and hover your mouse over the exact location you want to navigate to. Right click, and select "Drop LatLng Marker".
You will get a little marker with the lattitude & longitude. Depending on your GPS (I use Garmin, and it's a breeze) enter these coordinates and save them as a favorite by field name.
You'll never get lost again!! Good luck!
41.29280, -80.77995