Well, we could do it rather easily with the implication that Saint Attila used long ago... The Holy Hand Grenade of Antioch. But they are rare and the Book of Armaments rarer still....

But really, if we needed to hide him somewhere it needs to be somewhere inconspicuous that the Germans wouldn't think of looking. A church maybe, or something along those lines. And on the lines of how information is passed, well Jude conceivably lives the farthest outside of Épernay, with him being a cow farmer and all so he would probably be the first to get information, from let us say messengers going from town to town, and he would pass it along maybe going to the Petiot's cafe and pass it along. Because well he is french it would be weird for him to [b]not[/b] got to a cafe. But that is just one little segment of communication their will be a lot. Delphine probably hears things from the officers that go the cafe, Guillaume would have his connections within the French Scouts and so on and so forth.