So we woke-up one morning, and thought we smelled gas. Luckily, a neighbor is a chemical engineer who taught me a trick to pinpoint the source of the leak.
Simply mix some dishwashing liquid with water in a spray bottle (heavy on the dishwashing liquid!), spray it all over the line, starting at the tanks, and watch for the bubbles.
It worked perfectly!
I knew I’d need some “plumbers tape” for the connections, and our friend said not to use the stuff made for plumbing (water) connections. Rather, there’s a special type of tape made for gas lines, so I ordered a roll of that, too, and applied it to the pigtail connections, as well as the main line out to the RV.
In the end, it was a quick & easy repair that only required a couple of wrenches (for the hose fittings), and our leak was fixed. In fact, it was downright simple compared to replacing the power converter.