Whisk yogurt, mayonnaise, mustard, vinegar, sugar, tarragon, salt , celery salt and pepper in a medium bowl.
Add chicken, celery, cranberries and pecans and stir until completely coated.
Lay wraps on work surface. Divide lettuce among the wraps. Top with chicken salad, about ½ cup salad per wrap. Wrap up into rolls and cut in half. Serve immediately or chill.
