Questions BEFORE interview weekend

[pgt2018]

I’ve received several invitations to interview/recruitment weekends and wondering if I should ask specific questions about the interview day itself e.g. who I’ll be meeting (other than your POI), interview format, what I should expect to present / talk about, etc. 

Most schools have an admin person taking care of interview weekend, but one school in particular has their grad students handle interview wknd. Most of the info they send out seems to be very generic so I want to get more details for prep.