> How big is the propane tank?

Big enough to hold 3 gallons.  That is, my '87 VW
Camper manual states the tank is 3 gallons.  But the
tank is only filled to 80% to have some space for thermal
expansion, so that means 2.4 gallons of propane.

Everyone pretty much agrees that the Westy propane
tank will run the fridge for two weeks, minimum.

GoWesty states 3.3 gallons for their replacement tank.

Richard
Boulder