I just interviewed with Elon and don't mind offering some advice.
Most of the day is pretty straightforward. You meet with the head of the DPT program, the financial aid advisors, have an informal lunch with current students, learn about the clinical rotations, and receive a tour of the facility. All these events are not judged and focus on making sure you can learn about Elon's DPT program. So just stay relaxed and ask any questions you have.
At some point in between these events, depending on what group your in, you will have your interview session. This consists of 3 interviews with 3 different faculty members each consisting of 10 minutes. They will ask you an open ended question (typical DPT interview questions) and you will answer it and probably strike up a conversation. 2 of my interviews we spent almost the whole time talking about how fun it is to work with kids, so they really just want to know if you're someone they can have a conversation with (and therefor someone patients would like). Make sure you have questions to ask to fill up any free time at the end of the interview. Otherwise, it's more of a conversation than a grilling, and one of the current students informed me they are mainly evaluating your personality.