Good grief. You are dedicated!
This is terrible. I only have experience with the NYC sale. Even on the VIP day, there was bad behavior by people using one line sitter for 10 people, or one person having 6 or so friends join them in line. I gave up going early after i got pushed back so far by these shenanigans that I didn't make it in with the first group. These same people coordinate their purchasing efforts, run to various places and grab everything off the shelf, e.g., all the cashmere shawls. They then meet in a corner and divide up the stuff, and make calls to people not at the sale for their wish list. It is very discouraging. For those who want silks or ties and are willing to wait, I guess you can get a good price, but everything else is hit or miss depending on the year.