I actually went just the other day; all I did to setup the meeting was look on the schools website to find out who the dean of admissions is and called her office. I just told them I was applying as a transfer student and was planning on making a visit . I then asked if she would be available to talk to me for a few minutes and they setup an appointment.
I went to into her office and she had my file there to look over. My school hadn't sent my transcript yet so I brought a copy of my grades printed from my school's online grading service for her to look at. It was very informal and general, I told her that I wanted to go to school there and briefly gave a few reasons why. She asked a few questions about where I wanted to practice, etc. I had a few specific question to ask her which she answered. The whole thing lasted about 10-15 minutes and she gave me a paper regarding law review before I left.
Overall, it wasn't very informative, but that wasn't the point in going. I am glad I went because if nothing else at least it showed them that I was truly interested in the school and will allow them to put a face with a name when my application is formally reviewed.
To answer your question about wanting to be in the geographic location, it came up and I basically said I had lived in the state all my life and wanted to practice there after I graduate.