Is there more than one door location to enter the vendor hall when it opens at 10AM each morning?
8 sets of doors
So I can go into the Vendor Hall around 10 without having to go through that insane mass of people at the main hall entrance?
There are some entrances not available to the general public, and usable only by folks with vendor badges or the like. Other than that, every available entrance will be swarmed at 10am, especially on Thursday morning.
If you don't want to deal with the crowds, plan to go later when the crowds have died down.
If you go at 10:15 am, the swarm should be inside.
Get there at 10:10 and you'll walk right in (or, I should say, 10 minutes after they open the doors, in case they aren't punctual).
Get there at 10 on Friday, Saturday or Sunday and you'll be in a few minutes.