Suggestions for Austin to Niagara Falls

[SnowTown]

So far I'm thinking of... (* next to places I might spend the night at...)

Austin -to- *Little Rock -to-Memphis-to-*Great Smoky Mountains National Park-to-*Shenandoah National Park-to-Washington Dc-to-Philadelphia-to-*New York, NY-to-Buffalo, NY-to-*Niagara Falls---and coming back---

Niagara Falls-to-Fort Knox area-to-New Orleans-to-Austin

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Any attractions or foods good/special around those areas I should pay a visit/bite?

Thanks.