A few years ago I installed an Olympian brand catalytic heater in my
Vanagon.  I love it.  It works great and makes cold mountain camping
downright cozy.

I plumbed it into the existing gas lines and mounted a quick-release gas
fitting on the lower right corner of the kitchen cabinet so that the heater
literally plugs in there.

The only problem is, the little 3 gallon propane tank wasn't really designed
for this additional load, so on camping trips longer than about 3 nights, if
I'm using the heater, I run out of gas.

I'm now considering mounting an additional, reusable, propane tank, the type
that you can refil or exchange, inside the cabin, possibly on the platform
behind the driver's seat.

Does anyone have experience with adding propane capacity to a vanagon?

Thanks,
Paul