I find the secret is to leave traps everywhere (Especially land mines, assuming you wear powered armor or have 8+ trap skill, otherwise just lots of less explosive traps) around your safe house; randomly around the building, doors, windows, hallways, stairs, your workshop, your bed, I’ve woken up to random wandering murderhobos/moose/zombears exploding so many times I started wearing earplugs to sleep.
NOTE: Use ONLY bear/crossbow/shotgun traps around your workshop/bed, or you will probably follow my example and wake up to a face full of explosions and shrapnel (Which is similar to a shotgun blast to the face) as it kills everything in the room.