Try not to think of it as an interview. It's more of a group meeting where the dean gets to talk to everyone in a group setting. Just be relaxed and go with the flow of the conversation.
Host program is pretty straight-forward - you get to stay with first or second year medical students. Just be aware that many of them live within biking or walking distance and thus, you won't be able to drive to campus. Just shoot them an email and hopefully, they'll get back to you soon enough. Can't say anything about the quality of hotels in the area, unfortunately. There is the Marriott Courtyard and the Hotel Med Park which are right across from the education building, if you're looking for something close (you can literally walk across the street).