1. Did anyone actually set up a settlement here?
2. If so, what did you do for food/water for your settlers?
3. If so, do your settlers complain about not being able to go outside?
4. If so, what tasks do you assign your settlers?
For me, it seems pointless to set up a settlement here, since getting in and out of this place is a maze, no caravans can come there, and you can't set up a bar/clinic/trader/etc. stand to at least allow them to feel as if their self-imposed exile underground could lead to a 'normal' life.
Or, did I miss the point of having a workshop available to build in this area?