For the iced tea: Pour 8 cups boiling water over teabags in a heatproof pitcher and allow to brew, 3 to 5 minutes. Remove teabags and add sweetener to taste if using. Stir in 12 cups ice cubes until melted. Keep refrigerated until ready to use.
For the holiday pie spice blend: Mix together the sugar, cinnamon, 1 1/2 teaspoons salt, allspice, ginger, cloves and nutmeg in a small bowl and set aside.
For the nuts: Preheat the oven to 350 degrees F. Lightly oil a rimmed baking sheet.
Put the egg white in a large bowl and whisk until frothy. Add the almonds, hazelnuts, peanuts and pecans and toss to coat in the egg white. Add the spice blend and toss to coat.
Spread the nut mixture evenly out on the prepared baking sheet and bake, stirring occasionally, until golden brown, 15 to 20 minutes. Let cool on the baking sheet, then stir in the bacon and transfer to a large bowl. Serve with iced tea.