What is described above is exactly how my parent's tent trailer was set up in the '70's.
One night something happened, and a valve handle on a
propane tank broke off. We extinguished all fires in the area and let the tank vent. The smell did not please the neighbooring campers, but probably kept the skunks away for an evening :quiet.
When we got home, the side going to the broken tank was plugged and we ran on only one
propane tank for many years.
-- Dan Meyer