Where can i find an organization that will host 45 volunteers to work on a social justice issue?

My group of 45 individuals made up of entirely college students are hoping to spend our spring break working on a social justice issue and changing the world. We need to find a site that is outside of the state of Illinois and were hoping to be housed and fed by our host site. In the past we have worked with Habitat for Humanity and have stayed in churches. If anyone has any organizations or places that would even sound remotley what I am talking about please feel free to say something about them. Any information would be greatly appreciated. Thank you