Large live MTT vs poor players

[StewiesMinion]

I plan on playing in a either a $300 or $500 WSOP Circuit event at the end of the month and I am really unsure of what is the best way to approach it. I've been told that they bring about 500+ entries and are full of dead money.

What would be the best way to approach such a field? Also, should I expect a lot of these guys to play weak and fold hand or just call me down with ATC like most low-stake live players do?