[Daryles]

Our last dry camping 10 days on Ocracoke Island we ran out of propane 2 days before we were to leave. We have two 30lb tanks. One was full at the start one had 60% (Mopeka tank sensors are great). With the RV fridge in propane mode and using propane cooking we averaged 10% per day.
Water and temperatures were very mild. No furnace needed for the first 7 days. The last three days we had non stop rain and COLD!!! Solar panels did not work (no sun). We have a DC-DC charger. Ran the truck twice a day to charge the batteries.
We had to run the furnace occasionally during the day and often at night. We completely drained the propane tanks.
There is nowhere on Ocracoke Island to refill the tanks. We had to buy a BBQ grill 20lb tank to get us past the last two days. It's now a spare.

A 40lb tank will fit. It will be heavy to lift. Some one mentioned a long time ago about making a lift (pulley system??) To get the 40lb tank in and out.

Propane tanks
30# specs:
7.1 Gal
12.125 inches diameter
23.687 inches tall
25.4 pounds tare weight

40# specs:
9.4 gal
12.125 diameter
29.250 tall
33.6 pounds tare weight