hundreds of survivalists and ` preppers ' gathered in utah suburb friday .
learned new ways to deal with zombie apocalypse or a natural disaster .
shown underground bunkers , tactical weapons and an armed $ 2,500 motoped survival bike .
taught how to store food and dressed as zombies for special contest .
also met actors from amc hit show the walking dead , like addy miller .
scott stallings , one of preppercon 's founders , said utah made sense for the first expo because of the mormon culture 's emphasis on self-reliance .