Here's download sites for Missouri and Illinois county road maps

http://www.modot.org/newsandinfo/CountyMaps.htm

http://www.dot.il.gov/maps/generalmaps1.html

If your route goes through Pueblo, Colorado, I have made a local free site which includes lodging, food suggestions, best local routes, entertainment and an interactive map. It's only good for a couple days of your journey, but hopefully it will make your stay in Pueblo more enjoyable and easier:)
http://www.alternativecommutepueblo....-partners.html

Love or hate AAA,$48.00 membership is starting to look pretty good....I think they will map if for you also,with a Triptik,at least they used to include bicycles.