In my current game I made a simple but effective type of base that I haven't seen anyone else post about.
Here's a 3d view. Legend:
Orange: Wood blocks,
Green: barbed wire on the floor on top of wood blocks,
Dark blue : Anti-spider lip (goes all around, but I ran out of space in this voxel app),
Black: Threshold that prevents cops from seeing me too early,
White: where I stand during horde night.
At some point you can add a roof with bars for vulture protection.
It's not a maze, doesn't exploit loops or fall damage.. Doesn't use excessive traps or anything really. Just a staircase, some blocks that prevent line of sight so cops don't puke at my base, lots of barbed wire to slow them down, and a single line straight to me so...