grapes of wrath part 4

Chap. 17 says that a large group of people travel and they camp along the side of the highway and the finally they decide to create their own rules and laws. this chap. says that the farmers are no longer farmers. i wonder why the people who camp along side the highway decide to create their own laws and that? Now on to chap. 18. The Joads and Wilsons finally got through new mexico and arizona, and finally arriving in california. The men found a river a take a bath and they meet somebody who was returning from california because there was no work, and he tells them they are okies. After the men got done bathing, they continued on during the night. Noah says he would stay behind but Tom urges him to come with. Back in the tent, granma is ill. Then a policeman enters the tent and tells them they have to move on. and finally, chap. 19, when the chap. talks about how California once belonged to Mexico and how the Americans said they owned the land because they farmed it and that.