In the areas of central NC where I hunt a lot, winged elm is one of the most common trees in fencerows, old grown-up fields, thickets, and wood edges. Don't usually find them in creek bottoms as much. They're usually in the same general spots where you find a lot of cedar, sweetgums, and scrub pines. There are slippery and American elms growing pretty commonly in a lot of places, too, but they're harder to ID in the winter, and usually not as common as the winged elm.