My fiancee and I are moving cross country and we just signed a lease agreement for a condo 10 minutes away from the med school. We are moving there a month and a half before orientation, as we want to get settled in and explore the area before classes start for me. I used the school's FB group, Zillow, Trulia and other resources offered on the med school website to look for houses/apartments. I downloaded the Zillow app to my phone and selected several filters (price, bedrooms, etc) so I could narrow my search. It took us about a month until we found the condos we just signed a lease for. We didn't fly out to personally view the condos as they sent us floorplans, a virtual tour and brochures/pictures via email. I felt comfortable with the pictures/virtual tour because the condos are brand new and no one has lived in the unit that we are moving into. If it was a more established complex, I probably would have requested a virtual showing, e.g. Skype.
If you are looking for roommates, your school's Class of 2020 FB group page is probably your best bet! Also have a very good idea as to your budget and preferences before beginning your search - it'll save you a lot of frustration. Good luck!!