I was born and raised in Bourbonnais, Illinois and now live in Oklahoma. There is a town called St. George, are you sure that that cemetery is in Bourbonnais? Next time I go home I would love to check for you, but I do not know when the next time I will be there. I can try to have a niece or brother check it out for you. Neither are into genealogy so I am not for sure how long it will take me to get them to check it out.
There were several Boudreau's that lives in that area.