leave ours on for the fridge
The only real issue is remembering to turn off the fridge (and any other auto-sparkers such as the water heater) before entering a gas station. The propane doesn't have to be off. Just ignition sources.
I've only traveled through one tunnel so far, and I had researched it before hand.... no requirement to turn the LP off.
One wish list item I have would be for remote control switches for these appliances up on the dash. And maybe even a solenoid shut-off for the propane.
One side comment... I have an ARP controller installed on my fridge. It protects against overheating from conditions such as out of level. I have noticed that it will often shut off the fridge while travelling. I'm not sure if its more because of hills and rough roads, winds, maybe my controller tuning isn't quite right or the thermocouple placement isn't ideal.... or maybe the fridge really does just overheat a lot while underway.
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