Roughing it with a whiskey sour means not always having ice on hand. This is what we made one Saturday at the lake and it turned out pretty great.
3/4 oz of chilled Real Sour Mix
1 oz of Bourbon (that was stored in the cooler)
1/4 tsp of zest from a mandarin orange.
Add all ingredients in the glass and stir! If you happen to have ice in your cooler or water bottle, serve this drink over ice.