Who is Shakespearian Performer from Travels with Charley: In Search of America and what is their importance?

The Shakespearian performer shows up at the Maple River campsite in North Dakota just outside of Fargo. The performer has a small trailer house and a dog, and in this way resembles Steinbeck. The two introduce themselves and sit in Steinbeck's camper while drinking whiskey. The performer is an aging actor who travels about and does performances wherever he can and for whatever fee he can garner. In the tradition of the grand theatrical exit, the performer leaves Steinbeck wanting to know more.