All the SS says when you click on the beds is."i have to keep moving"
I think you can't stay there because the vault is stuck in emergency evac mode. I'm sure a mod well come out with the GECK to allow you to use it as a player home.
Edit: and here's the mod for a Vault 111 settlement, http://www.nexusmods.com/fallout4/mods/5820/ , I'm sure it will get better with the GECK release.
If you guys are looking for a vault to call home than *SPOILER* check out vault 81.
Same. Too many bad memories. You can stay in 81 anyway.
What, that 200 year long nap not enough for you?
I think it's supposed to be like that for in-story reasons, your Sole Survivor has no reason to want to go back into Vault 111 -- the place where their life literally changed forever and where they watch their...uh...marriage and parenthood get
How about, Kellogg'd? no? Never mind then.