Base buiilding is not really necessary at this point imo since it is far more advantagous to just rig a RV together and hit the road. Maybe when we can set up shelters and gather other survivors (maybe thats too far in the future, but a man can dream can’t he?) base building will have a purpose. Until then, to the deathmobile!
That said, turrets should be protected by walls of some sort as Zombears like to crush them like coke cans. Also I think noise emitters have great potential for creating choke points I was able to clear out a megastore by using one on an adjacent house, then burning it to the ground (sadly the fire spread to the megamart, rendering the arson useless
).
Also, gasoline soaked wood fences can be useful as well just be careful it doesn’t spread too quickly. Anyone try gasoline soaked chain fences?
Finally we need swinging blade traps (as giant axe blades) and remotely activated mines.