Hmm, I would have thought the opposite. Up in Jersey, you could commonly find kings and corns along the railroad tracks. Northern Pines would normally make egg laying burrows on the sloping sides of railroad grades as well. Evidently the kings and corns would lay their eggs in the partially rotted away railroad ties underneath the rails. Generally the kings preferred areas with water nearby, especially where a bridge was located, and the corns preferred it more higher and drier.
One thing I came to associate with eastern kings is the smell of pine trees.
Coastal milks seemed to prefer more hardwood forest areas.