The following info is from a teleconference we participated in held by Summit Entertainment with various fansites:
World Premiere will be Monday, November 12, 2012 in Los Angeles.
Camping will start Nov. 8th for registered campers.
They want to accommodate more campers than the past and have more activities, Monday, October 1st, more specific instructions about the registration will be revealed by Summit.
Registration for premiere camping will happen online, similar to the process for The Hunger Games premiere.