This fall I decided to work on reducing the fulltime background 12 V battery amps, which was running about .35 to .50 amps.  This is the battery amp draw in the background that can't be shut off without pulling DC fuses or turning the battery disconnect switch off.  The two largest amp draws were from the rear-view camera (.20 - .40 A depending on light conditions) and the CO/Propane detector (.12 A). 

I swapped the rear-view camera from constant 12 V to switched running-light power (from the tow vehicle).  It's easy once the path for the camera power wires are known, below is a pic of where to do this.  The dark-blue wire nuts are the original constant 12 V power, and the light-blue wire nuts are where to attach the switched 12 V power from the LED running lamps.  The pic is from the driver's side rear corner under the seat, the left-rear running lamp being at that corner.  For reference, the large black cable is the 120 VAC for the Park Power connector that replaced the "mouse hole", and the converter is in the upper left corner of the pic.

Next up was replacing the Saf-T-Alert CO/Propane detector (.12 A) with a RV Safe detector (.02 A) shown below.  About .1 A less for the same functionality.  Comes with a bezel, the left mounting hole was re-used and the right side is a new hole.

Additionally, the power for the Autowbrake brake controller was moved from fulltime 12 V to switched running lamp 12 V.  The fulltime current was very small, but I prefer being able to switch the brakes off from inside the tow vehicle.  The trailer running lamp power from the Jeep is fused at 20 A, being relay powered from the Mopar trailer harness, which is more than adequate.  Normal operating is with running lights turned on, which turns on the rear view camera and the electric brakes.

The end result is < 0.05 A fulltime background current, quite an improvement.  The RV Safe CO/Propane detector, voltmeter, maxxfan, and perhaps something else being the sources for the remaining current.