I am one of the stanford interns. I don't know exactly what the format will be this year, but last year there was an introductory session in the AM with representatives from each of the divisions, then 2 or 3 am interviews, a tour and a luncheon with the residents and faculty.
As far as lodging, there are some motels on El Camino in Mountain View and Palo Alto that were recommended last year. They can be hit or miss. I stayed with family for my interview, so I don't have any specific insight into any one in particular. You should be receiving a packet of info that has a list of recommended hotels.
Good luck!
Carrie