I've been wondering that, too. I don't know for sure, but IIRC, in the wake of the Church Commmittee hearings Corliss sued the intelligence community in the 1970s over surveillance of him, and I believe the VVAW and a number of other antiwar groups/individuals (such as Fonda) were also participants in that suit or a related suit. So it may be they continued to travel together into the 1970s.