As a fellow Illinois resident, I felt this!
One workaround to the IL rules for deer hunting that I learned of, you can set up an AR Pistol in 300 Blackout and use a single shot magazine insert and it is legal for firearm season. The IL Conservation Police confirmed the legality last year on Facebook, actually. If/when I get into firearm deer season, I may very well try that route. Right now I'm focused on gearing up for archery season, I'll see how I like that before investing in the AR Pistol setup (also want to wait out the current question on pistol braces before investing.