I just interviewed at UNMC in early September. There were around forty of us in a small conference room. We interviewed in waves starting at 11:00. There were school tours, a lunch, and a financial aid presentation with the day ending around 2:30. I actually had a good time. The other applicants were very friendly and my interviewer was great. She immediately put me at ease.
Good luck! I'll be starting in August and I don't want to be the only non-trad in our class!