Cook the Potatoes: Place 2 lbs of cubed russet potatoes in a large pot, cover with cold salted water, and boil for 15-20 minutes until fork-tender. Drain well in a colander and let cool.
Make the Dressing: While the potatoes cook, whisk together 1 cup mayonnaise, ½ cup sour cream, 1 tablespoon Dijon mustard, 1 tablespoon apple cider vinegar, and all seasonings in a small bowl until smooth.
Combine the Salad: In a large bowl, gently mix the cooled potatoes, 4 chopped hard-boiled eggs, 2 diced celery stalks, ¼ cup red onion, 6 slices of crumbled bacon, and 2 tablespoons of chives.
Dress and Chill: Pour the dressing over the potato mixture and gently fold until everything is evenly coated. Cover and refrigerate for at least one hour to allow the flavors to meld.