Chapel Hill, NC is very walkable itself. If you need to explore the area more freely, you sure need a car though.
New Orleans is that way as well. Itself manageable without owning a car. But exploring the area at large, surrounding cities etc. You do need a car.
It will not be the choice of someone who finds Miami heat and east coast humidity unacceptable. Had you been ok with those, these might have been nice picks.