I've spoken with many Instructors, many different states, and Illinois.
Unfortunately, even though many states are saying they will recognize Illinois' license - there is no formal reciprocity or formal recognition. And Illinois, at this time, will accept no one else's at all now.
Best thing to do is to teach Illinois and then have your students take Utah, and get Arizona (and/or Florida) - this will give them the best opportunity for traveling through many states with a concealed firearm.
We teach in McHenry and Gurnee, Illinois (along with a few other locations as needed). Link Removed