Propane water heater with shower is mounted to the door, 5 Gallon propane tank is mounted just inside to the left in an air-tight locker vented to outside air. Can slip-fit hot water line to sink when I want but never have. Tiny high putched buzzer on bottom of cabinet where I lay my head attached to toggle switch under bumper for "trip wire" of fishng line stretched around perimiter when boondocking in suspect locations. Four headlights on the roof give me a 5-10 seconds advantage!