Cache is not at the listed coordinates, but is within 1 mile. The difficulty is for the puzzle only and not the hide.
The Chambana locals may have an advantage in solving this puzzle, but anyone can solve this puzzle with internet resources and learn about Chambana (i.e. Urbana-Champaign).
To find the location of this cache, please follow the 3Is:
1) Identify
Four pictures below are taken from Google Map. Find out where these pictures are located in the map!
These locations are within 5 miles from the listed coordinates. There are nothing hidden at these places, but you need the locations to move on to part 2.
Essential hint: Two pictures are roofs of Meijers in this town. The other two pictures are roofs of Schnucks. All are places for grocery.
2) Intersect
Draw two lines from these locations. The "X" marks the spot!
Notice that each picture in part 1 has an "X" on it. Connect the following places with straight lines between these "X"s:
a) 2 Meijers
b) 2 Schnucks
I use Google Map to make this puzzle, although you may use any tools available online.
I also provide a Geochecker for you to check the answer. An approximate pair of GPS coordinates would be enough (within 30 feet or 10 meter radius). Use math and/or use Google to find the intersection coordinates.
Check your solution
3) Investigate
I expect there will be muggles around this area, so use stealth! Moreover, please find the cache outside the forbidden area. The cache location should be publicly accessible. You may need to have some extraction tools to retrieve the cache, but extraction without tools is possible. You also need to bring your own pen.
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My first hide!
FTF goes to OracleStone. Congratulations!