He engaged in soapbox oratory in the Sydney Domain and published a pamphlet that outlined his particular style of heterodox anarchism.

An acid trip in Windsor Great Park led to the notion of squatting on the former common land that had been in Crown ownership since being reserved for royal hunting by William the Conqueror, and he began to organise what was to become the People's Free Festival.

[8] Dwyer was imprisoned again attempting to organise another Windsor Free Festival in 1978, which did take place at Caesar's Camp nearby.

[1] He continued for some years to organise a People's Free Festival in Phoenix Park, campaigned for the legalisation of cannabis,[10] and petitioned for the H-Block hunger strikers in Long Kesh prison.

In the early 1990s he received critical head injuries in an accident while cycling in the Dublin Mountains and never fully recovered.