Corn snakes can be found native all across the US.
You can find them in southern IL as well... and it can get preeetty cold over here.
That's just a normal corn if it's not an eastern milk. Healthy looking little bugger though.
I don't know enough about those milks, but someone else on here might.
We based it off them being from the show because they were all kinds of crazy colors that you see being sold at shows, plus it was all within like 5 miles from the show.