Many folks in Alaska raise goats. They're tough, relatively easy to care for, and provide milk, meat, and--if you get the longhairs--mohair. I've been knitting with mohair lately, which I always thought of as scratchy stuff, but last week I discovered kid mohair: soft and wonderfully light. And mohair doesn't shrink. Not good for felting, but good if you accidentally wash that scarf in warm water. A friend of mine has been knitting with bison wool. It feels almost like cotton.
Alas, the mohair I've been finding in the knitting shop is from New Zealand. Not exactly low-energy fiber, hey what?