I have never been to the Commerce and can't attest to this for myself, but I have heard/read several stories about angle shooters. My buddy was there right before WSOP and made it sound like its the wild west of poker and angle shooting. He said angles are treated by staff like its just part of the game and found it odd how most of the players were so calm and used to it.
You won't have to worry about this in Limit, his big issue happened while "running it twice" which we can't do on the East Coast and he got burned when the guy who proposed the option to him claimed that it wasn't agreed upon after the 2nd run out. Ill invite him to this tread to see if he can write about his experience first hand.

I know this isn't exactly the help that you are looking for, but just be extra alert of all players actions as anyone should do when entering a new playing environment.

Have a good time and make sure to write a trip report when you get back.