Is there a way to survive outside the town walls overnight in Die2Nite?
Solution 1:
As of Season 2 — we can now camp outside.
Solution 2:
From what I understand, at some point in the future there will be some way to camp outside the town.
You can see a few hints of that in game already. One example is the ability to tag squares as suitable for camping.
At this point in time though, there is no way to survive outside of town through the night.