Been testing out my house mod with skyrim play-through. For some reason, I get a handful of draugrs appearing in the mod. Now a long while ago, I had a similar problem with npcs appearing and realized that I had used and mistakenly altered a default sleep AI package so everyone was showing up to sleep. That's not the case here.

There is nothing around my mod so I can't imagine where these dead crew are coming from, but how do I keep them (and potentially other unwanted npcs) from entering?

Is this down to the whole key and lock thing? (Which I haven't implemented.)