St. Louis - Urban Chestnut, Perennial, Schlafly. I disagree with the person who doesn't like 4 Hands. If you've got time to stop in a brewpub, go to Civil Life in South City. They've got great session ales.
Indianapolis - I've enjoyed Sun King whenever I've had it.
You're going through OH, so see if you can find some Great Lakes. Anything they make is good, but if you see Edmund Fitzgerald (porter), get that first.
PA has some fairly unusual alcohol laws. It's been a while since I've been there, but it used to be that only specially licensed restaurants and bars could sell six packs, or cold beer. They were always insanely expensive due to the cost of their liquor license. If you wanted to pay a more reasonable price, you had to buy warm beer by the case from a distributor. Hopefully someone from PA can jump in and say if that's still true.
Assuming PA hasn't loosened up, find yourself a bottle ship in DE and get whatever you can find from Victory. The Storm King (a RIS), Golden Monkey (Belgian golden strong/tripel), and Prima Pils are all good. 70 runs well south of the Philadelphia area and the brewery itself is way out of your way.
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