I disagree, the heater could be safe but any gas leak from the bottle, regulator or pipework is a bomb in the making. My regulator leaked, I was lucky and got away with it. Had the gas ignited I dread to think what could have happened.
Think about it, any gas leak is going to fill the back of the van, all that gas around your battery terminals, controller, pump, boiler and connections ........ madness.