You need to make sure your gas bottle(s) valves are open, (tanks are filled right?) and check your fridge before leaving home by disconnecting shore power (or throw the main breaker) and make sure the fridge switches to gas. Please don't take offense at the question about the bottles being filled... I have been there and done that. And yes, towing with the gas bottle valve open is normal.
Carr, Brenda, Hannah, Callie and Sammy. An F350, a 30WRLTSA, a couple of scooters, and little precious family time. We camp, we ride, we love.