Before you go running gas lines I'd take it to your propane dealer and see if they can fill it. I'm going the easy route and using 20lb bottles that I can easily get. My enclosure is being built to NFPA code which, when done correctly, makes the enclosure part of the exterior, (vapor tight to the interior and vented to the exterior). I'm actually planning to have two enclosures, one for my live tank and one for a second tank that will spend it's non travel time outside hooked up to the BBQ, Camp Chef and Lantern.