I have to admit, I've been following their forum ever since someone posted the link here a few months ago. Those people really do have their act together, especially in field-testing their gear and plans.
I've also been lurking around their website, and they seem like a great group. I'd love to go on their annual camping trip, seems like a lot of fun. Membership is priced fairly as well.
As for this wacky scenario, I think I'd try to fight my way to a rural area and find a well-fortified farmhouse to lay up in, kinda like Night of the Living Dead.