Making this trip in October with my 20 year old French au pair and my 3 year old daughter. So, two goals: split the trip into 2 days each way so the toddler doesn't lose it, and show the French girl some great parts of America! Roughly planning St Louis as halfway point there, see the Arch and what else? Would love suggestions on local/hole in the wall/semi-famous places for food, too. And thoughts on an alternate route home to catch something different. TIA!