Does anyone know how to get on to P&G's VIP list for these warehouse sales?

Earlier this year, i went to the warehouse sale on opening day to the general public looking to stock up on diapers. But when i got there, i was told by many people that a lot of the diapers (the sizes that i wanted) were already sold out a few days before to the VIPs. I don't want to be lining up in the cold early in the morning to find out later that the stuff i wanted were already sold out.