Who is Oregonian Service Station Owner from Travels with Charley: In Search of America and what is their importance?

The Oregonian service station owner helps Steinbeck out when he is in trouble. The rear tires on the camper truck have developed bubbles in the sidewalls due to being overloaded. One tire goes flat while Steinbeck drives in a rainstorm. Steinbeck thanks the man profusely and gives him a big bonus for the exceptionally good service.