I really didn't need a car in Chambana when I lived there because of the MTD. The number of routes and service times were always great, and got me pretty much anyplace I could ever want to go in either city. Buses were largely on-time, and even back then had text-for-times and a mobile website to check route information. I'm sure it's only better now.
If you do ride, keep an eye open for Bill #9, who is probably the kookiest conversationalist of a bus driver I've ever met. Every ride with him was fun, guy always had something to say. For instance, when we'd pass Goodwin and Green, he would comment about the "good win" the Illini had the previous week. What a character.