[FlameFanStuckinEDM]

I think you would need multiple dry moats. As long as it is a small area, around your farm for example, and you have the time. Dig 3 of them, as deep as you can, around your property and use the dirt from the moats to build up a wall behind the 3rd moat. As the zombies fall into the moat, you can walk up and stab them in the brain. As the moat fills up, you can have the safety of the other 2, while you spend time cleaning out the first one. You may also need to shore up the walls of the moats in order to avoid them falling in from rain or from the clawing zombies.

You would also need to build a drawbridge for your vehicle to be able to drive out and gather supplies. If your farm is connected to an underground water well, you should be set. Grow your own food and have your own source of water. You would only need to leave to gather fuel and other wanted items.

This is of course assuming that the zombies are slow, not the super athletes that Zack Snyder showed.