I saw a film about them at a Jewish film festival two or three years ago. They seemed like they really wanted to be the Canadian version of the Weavers.
More than the music, what struck me was how much they seemed to truly dislike each other. A couple seemed to even dislike folk music. The one member of Travellers who seemed to truly love folk music, Sid something, was treated very badly by the rest of the group. First they voted him out of the group and then they'd let him come on stage if he stood in the back behind everyone else.
It was very sad watching Sid get stomped on by the others and keep coming back for more.
Jerry