I believe over 90% of families are unprepared for a loss of services that would last more than a day or two.
Every time a snow storm is on the way the stores get mobbed and the nightly news shows the long lines and empty shelves. I always shake my head and wonder what is wrong with people. Services being down and stores being closed for a few days would hardly affect us at all.
I think RVers are far more prepared than the general public even without purposely trying. Much of the equipment and the systems we use when camping can be utilized in an emergency.