I would consider Alan Ginsberg as being more in the Beat Movement than a hippie. This included poets and writers like Ferlinghetti, Kerouac, Burroughs, and a whole bunch of others. They might be just a bit ticked off to be lumped in with hippies, who followed a few years after.

Offhand, I can't really think of any hippie poets and writers, at least none who were up the standards of the previously mentioned Beats.

Don Firth