I'm betting, Packman, that he wrapped them in foil or another protectant. One camping trip my wife did some carrots in foil with onions, jalapeno, celery, AND tomato slices. That was pretty good, albeit different. It's all good over the fire though, right? I think so.
We've done corn in the husk, but when foil's available, I use it. Spolied I suppose. By the way, I know you can make cordage from corn husks. I just need to try it sometime to prove I can do it.