The "preppers" I encounter are on ham radio, and I'd say they are more community conscious then the average person. Many of them work in public services (EMTs and the like) or are retired and formerly did. Most have stocked pantries, gardens are common. Most are willing to help out when there's a power outage or a fire. The anti-social picture that popular culture paints of preparedness-minded people is entirely not true in my experience.