right now several people are split on what week they are going i believe.like dante said ,its not free but a bunch of people are trying to get together when its best for them.i myself have locked in my trip,sept.6th til 13th,my flight is set and rooms.some are going the next week and i don't know how many are going either week but its what works for you.
i guess sometime down the road people will list which week they are going so all can make plans to meet up for as long as everybody is going to be there.