Try searching under migrant farm workers camps during the 1930s.   I believe there might be histories on a few around Bakersfield Cal.  

--- On Tue, 6/24/08, Meris Mullaley <[log in to unmask]> wrote:

From: Meris Mullaley <[log in to unmask]>
Subject: Hoovervilles and Shantytowns
To: [log in to unmask]
Date: Tuesday, June 24, 2008, 11:43 AM

Hello HISTARCH,

I am trying to compile a comparative study for a research design about  
an early 20th century hooverville (or shantytown).  But I am having a  
hard time finding information on similar excavations or sites. Perhaps  
I am just searching with the wrong keywords?  ("Hooverville  
Archaeology" gets me nowhere.)  Does anyone have any suggestions for  
references or sites, or even just search terms?  The site is in the  
Pacific Northwest, but I'll take any sites from around the country for  
comparison.

Thank you in advance for any assistance, it is very much appreciated!

*Meris Mullaley