License plate light should work, thanks.
Fan is more interesting yet. I only think that it will increase propane consumption. No, my Norcold doesn't have LAT, the light is Off when the door is closed.
Deviating from the topic - when I started monitoring the temps I was appalled. At 68 ambient and with the fridge side in shade, it has to be on the setting 3 or 4 to keep freezer at 0-2 and fridge at 40. At ambient 70 and/or when sun is shining on that side, it can't bring the freezer below 5 or 10. After a few days frost covers the freezer back wall and is accumulating near the freezer door, in one particular corner - must be poor door seal in this spot. To frost on fins I grew accustomed already, it's always there :). Don't know whether things would get any better on grid power.
Out of curiosity put the temp sensor in my home 110V fridge - stable as a rock, 2 and 38, door openings affect it (not much), and it reverts back to 2 and 38 in a few minutes after the door closure, - and never any frost. Just ranting, sorry.