I think you should get it off your mind. You're a freshman, and your interests may change radically by the time you apply to grad school. What if no one at UChicago ends up sharing your research interests? There's no point in going there, then. I think you should relax a bit and focus on doing well in the here and now (you'll have to do exceedingly well to get into a good Anth program anywhere), and develop your interests as you go.
...This is coming from someone who's been planning for grad school from day one, but hey, a professional master's is different!