Hi Johndean,
I am still planning on going, but I don't blame you for being scared. I can't figure out whether I'm more scared that I won't be able to get there (and get the interview over with) or that I will have to fly.
I would call the school, I'm sure they'll understand (just like they'll understand when I have to leave right after interviewing to get to the airport two hours before my flight). Let me know what you (and they) decide. 🙂 Liz