That's a good measure - but a completely passive one. At least carrying around the means to defend yourself and your family is somewhat proactive (and it can help handle other situations besides terrorists). The good news is that these measures are not mutually exclusive.
The permit thing is not necessary in Alaska. Assume everybody has a 44 magnum and you won't be far off. The real problem in Alaska would be its total dependence on constant resupply from Outside.