Hendricks adopted the name "cloudsmith", a moniker given him by artist compatriot Dick Higgins, for this extensive work depicting skies in paintings, on objects, in installations, and in performances.
This major performance was assisted by George Maciunas and attended by the likes of John Lennon, Yoko Ono, and Jill Johnston.
In 2002, he edited Critical Mass: Happenings, Fluxus, Performance, Intermedia and Rutgers University, 1958–1972, a book that documents the seminal creative activity and experimental work of faculty members such as Bob Watts, Allan Kaprow, George Brecht, Hendricks, and others.
As part of a performance for same-gender marriage rights, he presided at the art wedding of Jill Johnston and Ingrid Nyeboe in Denmark.
[15] Prior to his death in May 2018, he performed "Headstands for Peace", an event organized by Julie Evanoff in Washington Square Park.
[17] For decades, Hendricks also maintained a house, farm, and studio in Colindale, Cape Breton Island, Nova Scotia, where he would do much of his contemplative work.