One morning the hobbits woke to find the large field, south of Bilbo’s front door, covered with ropes and poles for tents and pavilions. A special entrance was cut into the bank leading to the road, and wide steps and a large white gate were built there. The three hobbit-families of Bagshot Row, adjoining the field, were intensely interested and generally envied. Old Gaffer Gamgee stopped even pretending to work in his garden. What do readers learn about the setting in this excerpt?