I ran episode 6 of Zombies in the Vineyard at the October Endgame (http://www.endgameoakland.com/) minicon last Saturday and strongly confirmed that having prior relationships among the PCs is the way to go, as a corporate trust-building team-building camping trip went terribly wrong in a very entertaining fashion. I did a brief writeup here (http://www.flick.com/~cdr/rpg/zomv/play06.txt).