In The Grapes of Wrath, why does Ma say that at Weedpatch she feels like she's come home?

From the text:

"I'm a-goin' to myself," Ma cried. "Jus' soon as I get finish' here. You show me how."

"I'm a-gonna do it ever' day," the girl said. "An' that lady—she seen me, an' she seen about the baby, an'—know what she said? Said they's a nurse comes ever' week. An' I'm to go see that nurse an' she'll tell me jus' what to do so's the baby'll be strong. Says all the ladies here do that. An' I'm a-gonna do it." The words bubbled out. "An'—know what—? Las' week they was a baby borned an' the whole camp give a party, an' they give clothes, an' they give stuff for the baby—even give a baby buggy—wicker one. Wasn't new, but they give it a coat a pink paint, an' it was jus' like new. An' they give the baby a name, an' had a cake. Oh, Lord!" She subsided, breathing heavily.

Ma said, "Praise God, we come home to our own people. I'm a-gonna have a bath."