Dear Leata and Bobby G.
I would not run your box on l/P while in transit...I would outfit tug and tow so you can provide the juice at 12v to the box if equipped...The idea that gas piping going bouncy down the road might loosen up next to a flame makes me shudder.
Its not recommended by the manufacturer or the RV associations, some states in the D.O.T. rules have it clearly stated that you should not.
Many do... The ice chest absorption models are the most common to cheat at this, or older folks who will to this day swear they can...The R.V. fires most commonly had are these individuals who sometimes rather innocently forget to switch over when they break camp as cited in the data presented to fire departments.
In several bulletins this is discouraged from the manufacturers and the insurance institute cites it as a leading cause of R.V. fires in transit.
The cost of the absorption system is the product liability insurance...not the material the unit is made off because this is well known as an issue.
The point is the industry that knows how to make cash out of risk has this technology down pat...
The consensus is not to travel using L/P by trailer or coach...Marine units are different and are built differently.
Happy Camping, Safe Trails.