By Sen. Martin Heinrich   If you’re like me, fall is your favorite season of the year. And if you read Backcountry Journal, there’s a pretty good chance that you feel most alive when the elk begin to bugle and the aspen leaves turn golden. Last autumn, I was lucky enough to draw a bull elk tag in one of the premier public land units in my home state of New Mexico. This unit is part of the Gila National Forest, where Aldo Leopold formed many of the ideas that guide the modern conservation ...