I know, it is going to be huge. There is some doubt posted on the other VFest forum, but I think it's going to sell out on Saturday even with the $$$ tickets.
I flew to Vegas to see the RHCPs last July for the free show they did and there were 50,000 people there. It was moved from a parking area to the fields of UNLV. It was so crowded that they blocked in the first few thousand people so that crowd rushing wouldn't occur. It was a mess. I'm sure that Seth Hurwitz will make sure details are covered.
I like the fact there are only two stages, one day, etc- it leads to a better show.