I just interviewed there last week. My experience there was phenomenal. The faculty, students and fellow pre-dents were all great and very easy to talk to.
The schedule you find in the interview guide is exactly the agenda you will follow for the day. The student tour is very informative, and the students there are all smiling and seem very happy. They all say hello and are very welcoming. Both the student and faculty interview is very laid back and they really just want to get to know who you are. My student was cool and hilarious, he made the 30 min go by very quickly. The staff interview was almost the same, and the doctor asked really basic questions about myself, stuff on AADSAS and some basic dental questions related to my experience. My interview with the doctor was almost an hour long, but it went by really fast. Make sure you have questions to ask, they really like it if you have questions for them.
I'm sure you will find it very relaxing and informative. I felt that Pacific was not there to trick you at all. Instead, they just want to see who you are and what you're all about. They are very big on the humanistic model, and when you are there, you will definitely get a taste of what it actually is. They also want to see if you yourself believes that Pacific is the choice for you. Just stay relaxed and I'm sure you will enjoy it as much as I did. Good Luck!