Always travel with propane off (since the 70's with the first camper). In general to many districts it is not allowed to have propane on, like tunnels, ferries etc.. Maybe 99% there will nothing ever happen and then comes the 1% along. The insurance company would not cover ignorance. If a Fridge is cold it will stay cold enough during travel. If worried a converter is safer route to go. And for the ones talking about converters be sure to get the facts straight. Propane connections can loosen up during travel. Even a brand new unit can have loose connections which will just pass PDI. I checked 5 connections and 3 of them where not tighten enough. Don't forget if they have a new trainee in the RV mfg. plant do you think he will be up to snuff. Hey I had a furnace which was improper installed; the combustion vent was not connected proper. Can they avoid those things in a mfg. plant NO. You cannot have an another person watch another his work. So it is up to every individual what risk they want to take by leaving the propane bottle open during travel.
That's why they say; "Ignorance is Bliss". Happy Travels!
2014 Ram 1500 CrewCab 4x4 5.7 Hemi 3.92 Rear and Air Lift 1000
2005 Jayco Jay Feather LGT - 29Y GVWR-6500 lbs.
Pro Series 1200 lbs. WDH with Double Sway Bar.
Champion 3100/2800 watt Inverter/Generator-Onboard Solar Power
ALJO 'Forever Young @ Heart' provide on their travels Music Entertainment to Senior Care Homes