Eric Berger, the science blogger at the online Houston Chronicle, wrote an article about the large WWII prison Camp at Hearne, Texas. (The site is now a historical site open to visitors.) Older readers responded to his article with their memories of POW camps. (The link below will take you to Berger's follow-up article comprising their comments.)
My mother remembers the camp at the old Fort Bend County Fair Grounds. She also remembers guards hauling inmates around the Humble Camp where they'd do manual labor. She was a child, but she said they seemed like very harmless fellows.
Notice that Berger's article includes a link to the Web site for the Hearne POW Camp.