Add sliced potatoes to a large saucepan. Cover with cold water, about an inch above the tops of the potatoes. Bring to a boil over MED-HIGH heat. Covering the pan helps this happen faster, but pay attention that it doesn't boil over!!
Once boiling, add 1 1/2 tsp kosher salt and stir. Boil, for 10-15 minutes, until potatoes are fork tender. Watch out for the foam on top of the water, it can boil over if you're not careful. Adjust the heat so that the potatoes are still boiling, but not so hot that they're roaring.
Drain potatoes in a colander, then return potatoes to the same hot pot you boiled them in. Add vinegar and stir to combine. Let sit a minute or two, then return to the colander to cool slightly.
While potatoes are cooling, add dressing ingredients plus remaining 1 tsp kosher salt to a large mixing bowl. Whisk together and set aside.
Chop eggs, red onion, celery and pickles. Add cooked potatoes to the dressing in the mixing bowl and top with chopped eggs, onion, celery, pickles and crumbled bacon.
Gently stir it all together, until well combined. Cover tightly and refrigerate until cold, at least 3-4 hours.