What happens next?

How to escape from an old style pow camp
Choose how to start escaping.
It needs to be as close to the wire or perimeter as possible, but be in a dormitory or area where the tunnelers can work 24/7, in relays, with lookouts and distractions. Another thing to remember is a cover.
If this is a real pow camp, then the guards will search under furniture. What is needed, is an area that they won't search.