Cook the cellentani pasta according to the package directions
Drain, rinse under cold water, and allow it to cool completely
In a large bowl, whisk together the light mayonnaise, light sour cream, ranch seasoning, and cold water until smooth and creamy
Add the chilled pasta, chopped turkey, chopped ham, diced Colby Jack cheese, low-sodium bacon bits, and shredded carrots
Gently toss until everything is evenly coated in the creamy ranch dressing
Taste and season with salt and black pepper as needed
Cover and refrigerate for at least 1 hour before serving to let the flavors come together
Sprinkle with dried parsley just before serving, then add your favorite crunchy topping for extra texture and flavor