In a medium bowl, combine mayonnaise and sour cream with dressing mix. Refrigerate for at least 1 to 2 hours, or until ready to use.
To assemble each wrap, spread about 1 tablespoon of mayonnaise mixture on each tortilla and top with lettuce, tomatoes and bacon. Roll tightly and secure with a toothpick and refrigerate until ready to serve.
For safe meat preparation, reference the USDA website.