Went there Dec 8th (got my card Jan 10, though my wife got
her stamp at the same time and did not get her card yet).
Get an Infopass appointment (at the time, they were about
2 weeks out). Try to take the first available appointment
in the morning (I think it's 07:30) and get there
around 07:05 or 07:10. That's what we did.
We were out by 07:45.
Documents are whatever is listed in the notice. Basically,
your passport, original approval notice, 2 photos.
I anything else is listed on the approval notice, take it
with you. We took Advance Parole and EAD just in case.
The officer who stamped my passport asked me for
my Advance Parole and took it. The officer who stamped
my wife's passport did not. Of course, they took away
our I-94.