You could try DaiZy. It's a single player mod of dayz. I've started playing it since hackers have become so rampant. You can play with or without ai survivors and bandits. There is also a base building system implemented where you can use wood, wires, sandbags, etc to build buildings for bases. I also like being able to save my game and not worry about losing my camp or vehicles due to glitchy server restarts.