There's free live entertainment which was pretty good (in Spanish). It's right next to the turkey leg booth. A lot of people were enjoying the music while gnawing on their drumstick.
Many of the vendors have permanent buildings, but there are plenty who just set up a sunscreen for the day.
The produce really is a bargain here. I bought enough avocados, tomatoes, jalapenos and cilantro to make some salsa for less than $5, including a bag of corn chips!
While I was finishing this blog look what parked next to me. It only took about ten minutes to set up; plenty of sleeping space for two people with room to spare.