Hance and Chris have it right. You won't be in the way, and the teams, especially Brethren teams will be glad to meet you and talk, as long as you respect their time. If someone stops by to chat and I have to go do something I excuse my self and let them know that I'll be tied up for xx minutes. They are welcome to stay or can even tag along. But, during crunch time (10:00 - 1:30, typically), I may be busy more than available.
I also agree that if the cost of the entry fee and meat isn't a problem, go for the full sanctioned comp. You'll learn a lot more and have a lot more fun!