I was an undergrad in the Anthro department there, spending many hours in labs in Kroeber Hall. I remember overhearing several conversations between grad students and professors regarding the new grad students accepted into the program. Typically, the grad students accepted are from well known colleagues in the field from the big name schools or worked with big name CRM firms (if archaeology). They were saying things like, "So-and-so came from Harvard and worked with XYZ...or So-and-so came from University of Chicago and worked with ABC..."
Then I remember them talking about one student who was the affirmative action acceptance and they had no idea who he was or who he worked with as an undergrad and were talking about how worried they were. Those professors are very picky as to which undergrads they write letters of recommendation for as it could either make them look really good or bad. I learned that the hard way after a year and a half of research.
If you're set on Berkeley, you might want to try the Masters route or research route first. Good luck.