Southern IL does have some great towns and people. Grew up there and still have family there. Flatlanders just wouldn't understand. That said, Kentucky does start well before you cross the Ohio River...If Weld got to jump to Wyoming, Moffet county would be close behind.
Summit and Park County would probably declare themselves sovereign at that point. The world's laws don't really apply in the high country and the folks up there know it.
Wouldn't it be better if the awesome flat part of indiana joined up with the super cool flat part of Illinois and the dirty hillbillies from the southern parts of both states had to somehow make a state and survive on their own? I think that would be the way to go.