Hope it was JW Blue, that makes any occasion better.
Anyway I bring a pad folio (those zipper leather bound folder)
I have a few CVs (in general you always want to have a CV ready to go) AACPMAS copy and a notepad. Obviously use the notepad as much as you can as said it helps with making decision, follow up questions or I even have questions written down for interviewers. It also has the spots for business cards so I am easily reminded to write thank you letters as a follow up.
Back on point I have never actually been asked for a copy of anything at an interview, I just keep a CV on hand always for 2 reasons. 1. it is something you should just always do, one should be able to produce a current resume virtually on the spot. 2 you never know who might interview you. At Scholl 2 interviewers called off the morning of the interview, so the people who actually interviewed might not have seen my file much. While I was not asked to produce a CV the peace of mind having it was well worth the 5 cents to print them.