Since it's now the 17th, and you posted this question on the 9th, I'm hoping that you've already contacted PM customer service for your info...and rec'd your answer.
The Culver City conference this year is a single day event.
Last year was a 2 day event as most conferences are. However, there are other 1 day events too.
Again, check w/PM customer service for specifics and confirmation...send them an email ;-)
Regardless, you'll have a great time!