How fast can you pack?

Our escrow close date for our house in Long Beach is set for September 2--in 27 days. Or, it was. I've just found out that there is a possibility that it may be moved up to August 22, which is a mere 16 days away! Yikes! Not that we have to move the weekend after, but that is what we would try to do. No sense in keeping our family apart any longer than necessary, right? I'd better get busy, all I have packed is a few small boxes of books!