Last year (and previous years too, I assume) it was at the Cricket...er, aah...First Tennessee (or whoever has bought it this year) Pavillion in downtown Chattanooga, somewhere near that football stadium.
It was a festival celebrating mostly German stuff. Bratwursts, Dachsunds, German beer, and with us there...German cars. There were other things there as well, such as arts and crafts, kiddie games, American food and drink, etc.
All those who entered their cars for a small fee (donation) got a T-shirt.