i and my kids and many other people we know have , or have had, burners in vans , i have made and fitted loads of them. the size burner for a van doesn't use masses of fuel and wil stay in all night with a shovel of coal . look at the windysmithy 'wendy' stove foor an idea of size, i've fitted a lot of these into lwb sprinter size vans, good little burner , about 2kw. i've often mounted them on cabinets to save space and flue pipe and give fuel storage this is a wendy
As you are well aware, a very common feature in the not so distant past, sadly the fact is nowadays most wilders are looking over their shoulders most of the time, and a plume of smoke is a dead giveaway. Thinking Spain/Portugal, places such as Orgiva, Bahia, a woodburner of some description was virtually mandatory, even in campsites.
Now more people travelling in conventional vans, aren't likely to be tempted to punch a hole through the
roof, and somehow a cast iron or ex Calor cylinder just doesn't fit in with the alloy wheel image,
leave alone the borderline overweight issues.