Combine the sugar, corn syrup, salt and water in a saucepan and bring to a boil over medium-high heat. Stir constantly until the sugar dissolves. Once the sugar has dissolved do not stir, but swirl the pan occasionally until the mixture reaches 325°F on a candy thermometer.
Remove from heat and stir in the vanilla and baking soda – the mixture will foam up in the pan. Stir in the bacon and nuts. Immediately pour onto a rimmed baking sheet that has been sprayed with nonstick spray and spread out fairly thin with a spatula or the back of a spoon that has been sprayed as well.
Cool completely and break into chunks. Store in an airtight container for up to 2 weeks.