Tristan da Cunha
If your survival planning includes the possibility of nuclear war or total economic collapse, the Tristan da Cunha chain of five islands is worth considering. Tristan da Cunha is the only occupied island in the group, and its hamlet of Edinburgh has about 300 residents. This British territory is the most remote inhabited archipelago on Earth, and it supports itself with a thriving crawfish industry, limited tourism, and the sale of coins and stamps. Residents feed themselves by growing potatoes and other subsistence crops, raising livestock, and harvesting the abundant fish populations.
Tierra del Fuego
This archipelago near the southernmost tip of South America is so remote that global events are unlikely to have an impact here. In a nuclear war, prevailing wind patterns will keep fallout away and protect the residents from radiation. If you can handle the cold, wet weather and high winds, you'll be rewarded with scenic vistas and world-class trout fishing.
This area of northwestern Canada has an abundance of natural resources and a population density that's less than one person per square mile. It has plenty of water, fish, game and land for everyone, and a network of rivers makes traveling easy. The Yukon has no military targets, and it's above potential fallout patterns. It's also subject to minimal government regulation and influence. Harsh winters keep riffraff away, but cheap land and readily available timber for building and staying warm appeal to pioneer spirits.
This area is a popular destination for many survivalists, and the reasons are obvious. It has more wilderness than all other states in the lower 48, a low population density, minimal gun laws, a low crime rate, a mild climate, plentiful game and fish, few restrictions on home schooling, a government that rarely intrudes on the lives of residents, and low costs of land ownership and development. This is offset by federal ownership of most land, a high state income tax and low average wages. On balance, Idaho has a lot going for it, and it's upwind of most military targets so fallout should be minimal.
Many survivalists call the Ozarks home, including Kurt Saxon who came up with the name and is credited as the father of survivalism (according to Survivalplus.com). A temperate climate, fertile soil, plenty of rainfall and a long growing season make it possible to grow almost anything here. Numerous rivers, lakes and natural springs provide ready water access and excellent fishing. Game is also plentiful and gun ownership is encouraged. Strong family and religious ties keep crime rates low, and the cost of living is also among the lowest in the country.