while i don't cosplay some places to store stuff are
in bag check
with friends
if you happen to have a vip tix the lounge has a bag check
There is food in the Javits but you can bring food in as well.
where do you see the requirement for an id & cc? iirc, you don't kneed those for entrance- just to buy stuff
oh, wait, if you need to pick up your ticket you might need the id&cc
i'm going to move this to the NYCC area so folks can give you specific advice for NYCC