I’ve have done several “Song of Farewell”s but not this one set by Michael Joncas in Gather 3rd edition. The text is from the Memorial Acclamation and In paradisum, with extra words from Michael Marchal. There is a special verse for the funeral of a child, which is thoughtful.
The sheet music, available at GIA, has parts for Choir, cantor, Assembly, Keyboard, Guitar, Flute, Oboe and Bass. The is in their preview.