Originally Posted by fredaevans
There are usually two 'auto starters' in a MH: furnace and hot water. As noted above these have to be manually turned off.
Turning them off manually is of course the best action, but leaving them on while on a ferry or through a tunnel is rather benign without the presence of any gas or fumes.
In a fuel station it is best to turn off all sources of ignition. If you fear you might forget to turn on the fridge after a fuel stop, a magnetic 'tag' that you remove from the fridge and move to the dashboard when you turn it off can help you remember to turn it on again as you prepare to drive off from the station.