I live in Missouri and go every year to see my brother in Augusta Georgia. I route my trip so I DO NOT travel through Illinois. It's a little longer but WELL worth it. This is the route I take going straight to Augusta:
St Louis, MO
377 ft/Head toward S Tucker Blvd on Market St.
1.5 mi/Turn right onto S Tucker Blvd.
0.2 mi/Continue on Gravois Ave (MO-30).
189.7 mi/Turn left and take ramp onto I-55 S toward Memphis.
26.4 mi/Take exit #17A/I-155 E/US-412 E/Dyersburg. Tn. to the left onto I-155 E.
43.0 mi/Take exit #15/US-51 S/US-412 E/Dyersburg/Jackson onto State Hwy 20, State Hwy 3 (US-412 E, US-51 S).
126.3 mi/Turn left and take ramp onto I-40 E toward Nashville.
7.3 mi/Take exit #206/I-440 E/Knoxville onto I-440 E.
132.7 mi/Take the I-24 E/Chattanooga exit onto I-24 E.
109.4 mi/Take exit #185A/I-75 S/Atlanta onto I-75 S.
142.0 mi/Take exit #247/I-20 E/I-20 W/Augusta/Ralph D. Abernathy Fwy/Birmingham onto East Expy, Ralph David Abernathy Fwy (I-20 E) toward Augusta.
0.4 mi/Take exit #199/GA-28/Augusta/Washington Rd.
5.1 mi/Turn right onto Washington Rd, Savannah River Scenic Hwy (GA-28).
0.2 mi/Make a U-turn onto Greene St.
0.2 mi/Turn right onto 13th St (GA-4).
Arrive at 13th St, Jefferson Davis Memorial Hwy, McKinnie St (US-25-BR). The trip takes 784.4 mi/ and 12:04 h.
(beginning and ending points are just chosen by random, I don't live in St. Louis)
It's a beautiful route, though sometimes I visit other relatives in Greer, SC on the way down and stop at the Cumberland Gap just to climb and look at the scenery, well worth the extra time to stop, BTW.
As the others have said, look at the state statutes for each state you are going through (you should know Georgia, then there is Tennessee and Missouri AND print them out and carry them with you in case you get stopped and have to show proof that you are legal in that state in that type of carry (happens more than I care to say). Oh and hope you enjoy your time in Missouri
