I'm mostly paleo too, and it's a difficult prospect to have some food stores that are paleo.

What I've settled on is having canned/foil pack tuna/chicken/beef, canned fruits/veggies, and lots of healthy fats around. If I don't eat the canned stuff, I donate it yearly and buy some new stuff.

On top if that, I am planning on making buckets if long term storage rice and beans. If we are to that point, we won't be too concerned about eating non-paleo. I don't put away anything with gluten, it just makes me way too sick.