I planned a short three scenario campaign but sadly ran out of time and didn't have enough painted models to run it this Halloween, better luck next year I guess.
In a nutshell: The first scenario sees the players start in suburbia, where they must find a suitable escape vehicle, get fuel for it and try to escape from there. Along the way they could find extra weapons.
Second scenario sees the players gather up supplies in an abandoned supermarket, where they were required to load up on food and ammo. Each player carry a single token of ammo or supplies, or take a shopping cart and load that up.
The final scenario has the players hold out in a ramshackle house of sorts until help arrives. I toyed with the idea of allowing the players to plant traps but decided against it, instead giving them just a house and maybe a mounted weapon if they were nice enough.