The two options I am currently considering are
1) through Tulsa, OK to Sprinfield, MO to St. Louis to Indy.
or more likely
2) through Texarkana to Little Rock to Memphis to Cairo, IL to Indy.
Any suggestions for where I could look for good routes. I am aware of the Mississiippi River Trail and the excellent Illinois DOT bike maps, and the suggested routes in the Indiana gazetteer. Beyond that, I need help.