I'm a second year student at UHS. Be prepared to really enjoy your interview day. I'm sure you've heard it all, so I won't say too much more. It's a relaxing day. It's your chance to check out UHS, the campus, the faculty, and especially the students. Keep your eyes and ears open and decide by the end of the day if you'd like to be at UHS. The interview is very conversational. Dr. Butterworth is an interviewer, but she does not talk to all students. Don't let the ethical type questions stump you. Tell them your ideas and stick with your idea even if they appear to disagree with you.
Again, have fun!
I'm originally from Olathe, so I know the situation you're in coming from Overland Park....UHS would be ideal (aside from the financial burdens you'll end up with).
Let me know if you have any other questions.