Originally Posted by RP53
we would just like to have more space in the frig
Unfortunately, gas absorption fridges don't work that way. The very cold refrigerant runs past the plate that forms the freezer and then rolls past the fins in the fridge.
The thermostat only controls the fridge temperature, so that it stays as cold as possible without freezing.
If you compromise the insulation for the freezer section, too warm refrigerant will be delivered to the refrigerator section and you'll have plenty of spoiled food.
Best solution: Figure out what supplies can start the trip frozen and move them down to the fridge as space becomes available.