The balloon bombs are something we take seriously in the PNW. It is believed that there are dozens of undiscovered crash sites spread through out the vast wilderness areas that no one hikes. The latest one discovered was in 2014 in British Columbia and was considered to have still been explosive. It was cleared using C4 charges. Every school child is taught to be aware of any large wheel like object found in the woods.
The German POW camps, from some local oral accounts, were fairly slack. The Germans didn't want to escape and go back to fight for ******. It was common to issue day passes for them to go in to town, and return to the camp at night fall. Or so it was portrayed that way by the War Department, to encourage active German solders to surrender.
With that said, this escape attempt should be made in to a movie.
In an American Prisoner-of-War camp in Papago Park, AZ, German prisoners turn industrious to organize a breakout and plan their escape to freedom. During World War II, even a safe place like Arizona could be a battle zone, even if only briefly.
www.historynet.com