Thank you for caring. I dont think you have to put a trail of food from the street. If you find a safe feeding spot by your house they will find it. Consistantly feed them them & you can start trapping them from the feeding area. nuetered or spayed/ Then release back again.
I know it does get cold in Illinois (I had lived there years ago) You could provide a shelter for the outdoor ferals during the cold season. Keep us posted how things go in your efforts