[psomers]

Is your camper plugged into shore power? If not, putting frig on auto will not help. Did you check the temperature in middle of day at 108 degrees. Was side of camper with frig have full sun. Feel your evaporator fins. Are they cold. Put hand on floor of freezer. It feel really cold. What about condenser tubes in back. Should be hot. Frig may be doing all it can do. With vent cover off place fan to blow on condenser coils to see if that helps.
Good luck and hope trip to Yellowstone works out. Been twice and DW would go back today.