Hey, Congrats on your interview! First of all, don't be nervous. If you decide to stay at the hotel, you will have breakfast w/ other students who will be interviewing w/ you, so take advantage of that and get to know them. It will make you more comfortable during the whole day to "know" a few people!
Next, ask as many questions you want from Dr. Haight! He is the sweetest, nicest man EVER, so just relax and ask all you need to ask. He is NOT on the admissions committee, so you won't ne penalized for stupid/lame questions, don't worry! OK, Now for the interview. BREATH and RELAX! I know it's hard, but just understand that they are a panel of three faculty/administrators and one student, and they truly want to accept you. They are looking for REASONS to accept you, so as long as you act like yourself and answer their questions to the best of your ability, you'll be fine. Dancer was right about the subjects that they inquire about, so I won't go into that. Just know your application like the back of your hand, and be prepared to answer funky questions like "Who do you consider to be your hero?" That one got me, but I managed to stammer something coherent out, thank god!

Oh, and pay attention to what the other interviewee's (sp?) are being asked, and what they are saying. Don't stare at the walls, and always maintain good eye contact. That's it! Just relax, be yourself, and give them a reason for picking YOU above everyone else! Good luck! Hope to see you in the fall!