Who is Northern Michigan Man from Travels with Charley: In Search of America and what is their importance?

The northern Michigan man attempts to chase Steinbeck off private land near a lake. Steinbeck treats the man cordially, and they become friendly to the point that the man shows a picture of his wife, directs Steinbeck to park his camper truck where it cannot be seen from the road, and fishes with the author the next day.