The Rockies. There’s already a low population in a lot of areas, millions of acres set aside as wilderness, fresh water and game, wood, steep terrrain, fire lookouts/ranger cabins/cabins/abandoned mines. Winter show would also slow/hinder zombies and make for an easier kill. The downside is that I know I wouldn’t be the only one and the main threat would be all the other backcountry survivalists heading for the hills and defending their resources.