I took a shade tent and kind of tailgated behind one of the flight lines last year. I was flying, so people would stop by and check out my planes and chat. You won't get bored I promise! There are quite a few vendor tents to go through as well, so take some money.
Like I said, I had a shade tent, a table to work on planes, and one to set out food and drink and just ate and chatted with my tent neighbors and other pilots. It's a really good time.