I would bring CV or other pertinant info. and I would try to get suggestions about how well you fit the profile they are looking for (and therefore how to present yourself in your personal statement and secondaries). Other than that, I'd ask the same "get to know the school" questions that are good to discuss at your interviews.
I wouldn't expect it to be a grilling. I would assume it will be casual. Mine were.
As for early decision... unless the ADCOM member says you are a shew in and you definitely want to go there, I wouldnt do it. I did not apply early decision after discussing it with Dean of Adm, because she said it did not improve my chances of admission - and most importantly, if I was good enough to be interviewed as an early admit, I would get an early interview anyway. She was right, I was interviewed on the first interview date for both of my state schools and within 2-3 wks of the first dates at other schools. So, whats the benefit? Just get your stuff in EARLY, and you get the same benefit.
