Thanks to pondprowler64 for selling me his old GPS unit
I was playing around with it today and actually figured out how to punch in coordinates. There is a cache hidden right in downtown Elgin, but the area is closed due to flooding (at leaset, it WAS there!). The GPS unit is very cool. Once I entered the coordinates, you just follow the direction of the arrow to the spot!
The kids are really going to have fun with this!