“You watch all those large-scale documentaries, and they sort of freak you out. You almost don’t even know what to do with them,” Hailey Wist says. “If you watch something that fires you up and makes you have fun, then there’s the social incentive to make small changes in your life.” That’s why she made The Garden Summer, which will premiere to a sold-out audience tonight. Wist invited four suburbanites to spend the summer on an Arkansas farm growing food and selling it at a local farmers market.