After long thought and lots of head-scratching I think I figured out a decent way to hold a lantern on a shelf in the wagon. 
I found some old steel brackets and installed the shelf over the stove. This fits the newer “Blizzard” lanterns with the large tanks so I think all of my lanterns will fit.
I put a brass insert in the shelf and carved a small knob to fit. Please excuse the messy workbench. Of course, the rest of the vardo build is here: Vardo Page.
Preindustrial Craftsmanship 
a nifty little idea…. u certainly don’t want that tipping over!
Certainly not! I kept the lanterns in the front outside box for my last trip but was wanting to be able to keep one in and ready to go. It is about as secure as it can get in this setup.