Reaching Out to First Interviewer in Prep for Superday??

Dearest Monkeys,

I am preparing for an upcoming superday for a BB equity research summer analyst position and I'm trying to network as much as possible with alumni and friends to best prepare for the interview. Should I also reach out to the two VPs who gave me my on campus interview (they were alums)? I want to ask them for some advice on what to prepare for but Im not sure if they will be interviewing me again. Does anyone have experience with networking (more like asking pointed questions) with first round interviewers? Thanks in advance