I do not think Brussels is an Island. Brussels is between the Mississippi and Illinois rivers. You can cross from Illinois to Brussels and cross the Golden Eagle Ferry to Missouri. If you are more north by Hardin you can cross by bridge from Ill. In Missouri to find a bridge you have to go to Louisana. I have crossed the ferries a few times but not on a motorcycle and just went from the Brussels ferry to the Golden Eagle ferry.
River Ferries of the Middle Mississippi River Valley