Light your campfire well ahead of time. To cook over the campfire, make sure the flame has burned down to a height just below your cooking grate. You don't want your skillet to be directly touching the fire or you'll burn the tortillas.
In a medium bowl, combine the shredded chicken, 1/2 cup of buffalo sauce, and cheese. Mix well.
Place the skillet on the fire cooking grate or on the camp stove and preheat for 2-3 minutes.
Spray the skillet with non-stick cooking spray.
Place a tortilla in the center of the skillet. Fill half of the tortilla with the buffalo chicken and cheese mixture, then fold the tortilla in half with the empty side covering the filling.
Cook for 2-4 minutes, until the bottom is lightly browned. Carefully flip the quesadilla over using a spatula. Continue to cook on the other side until lightly browned and the cheese is melted. *Keep in mind you may need to adjust the heat by moving the skillet closer to or further away from the fire as you cook.*
Repeat with remaining quesadillas.
Cut each quesadilla into thirds. Serve with Ranch, sour cream, Buffalo sauce, and celery sticks, if desired. Enjoy!