The family made a series of 78-rpm records for RCA Victor in the 1950s, some of which were later issued on RCA Camden LPs. There were also a few later recordings released on LPs, including some stereo sessions. In 1957, the Trapp Family Singers disbanded and went their separate ways. Maria and three of her children became missionaries in Papua New Guinea. In 1965, Maria moved back to Vermont to manage the Trapp Family Lodge, which had been named "Cor Unum". She began turning over management of the lodge to her son Johannes, although she was initially reluctant to do so.