I've walked the 4 "I" sections of the cemetery many times and can't find either Stanton or Essene Luke. There are several unmarked graves and "unknown" markers in the area so they could be in one of those. Will keep looking. Maybe they'll decide to "show up" during my next visit.
Hoffman Cemetery I was able to locate the cemetery using the info you provided made and found the corresponding GPS coordinates of 43.773N / 91.306W. (Perhaps you might want to update the cemetery main listing.)
When I looked it up on an online mapping site it showed the coordinates a distance from the road. Satellite view showed the same thing. Same thing when I checked it on a different mapping site.
It would appear the cemetery is on private property and may not be accessible.