Make tea with equal numbers of Orange Pekoe and Celestial Seasonings Wild Berry Zinger tea bags. Cool. (Dude.)
Instead of sugar, sweeten with sweet apple cider (Martinelli's is best, if you can find it) and black cherry juice. (R.W. Knudsen and Heinke's are the only brands of this that I know of. They are both bottled in Chico, California, and I don't know how widely they are distributed.) I like a mixture of about 10 parts tea, 3 parts apple cider and 1 part black cherry juice, so it is not too sweet.
Add just the smallest drop of lemon extract, or a squeeze of fresh lemon.
This is much better than those canned teas that are available now. And you can adjust the proportions to your personal taste. Actually, I think I'm going to go make some right now, before the chilly mountain night begins.