Thanks everyone for your quick replies.
I am suspecting a gas leak. Since we only occasionally smell a small wif of gas, I dismissed this as major.
The frig is always flashing the red light on gas, indicating it did not light even though it has a flame and cooling. I thought maybe the frig flame might be running non stop. I turned off the gas to frig and running 110 volt, I noticed the LP level drop but seems to be less.
Note: All testing has been with stove, water heater and furnace turned off. Only frig used because we have food in there. So the last test was overnight, with frig running on 110volt. In less than 12 hours the tank dropped from 3/4 to between 1/2 & 3/4. I can hear gas flowing through the regulator when the valve is open and everything off.
We just finished spraying the gas line from the valve up to 4 entry points through the floor with soapy water, no bubbles. Sprayed external and internal connections, when accessible on each appliance, no bubbles. Never gas build up in the cabin and rarely smelled inside.
Everything seems to be pointing to an external link primarily. I just switched the frig to gas, the flame is blue. The weather seal on the lower left corner of the frig door does not seal tight, I suspect this will cause the frig to run more than normal.
I am thinking:
1) A small and elusive gas link on the underside.
2) Frig needs a new door seal.
3) Frig may also have another issue since the red light always blinks when on gas even though it is cooling.
Conclusion: Spray down the lines again to find the leak and get a new door seal for frig. Going through 14 gallons of LP every 3 days is expensive!
The door seals are close to $200! Does anyone know of a source I can magnetic door seal in bulk roll and make a new seal?
How much does an LP gas detector cost?
Thanks again, I appreciate all your help.