The below photo was in Comic Con Annual that just came out. You can of course go for a hotel room not in the convention block, but they are more expensive or further away. For instructions on the new registration procedures for Comic Con see this post. The post also includes info about the con (They give you admission to the four-day event, but they don’t guarantee you admission to any given panel, so camping out may or may not be required) Tickets have not gone on sale as of yet.
No official announcement has been made yet by Summit/Lionsgate (or any movie studio), but we think it highly likely that a Breaking Dawn II panel will be there.