Preheat oven to 400˚F.
Arrange the bacon on slotted pan or on wire rack-lined baking sheet and bake until very crisp, 15 minutes. Raise heat of oven to 450˚F and bake the onion rings in single layer until crisp, about 20 minutes.
Preheat a large cast-iron skillet or griddle pan.
In a small bowl, combine sour cream with ketchup, relish, scallions, herbs, garlic, salt, pepper, lemon juice and hot sauce.
In a larger mixing bowl, combine turkey with salt, pepper, mustard and Worcestershire. Form 4 large patties of turkey thinner at center than edges for even cooking. Add oil to the pan, 1 turn, add the patties and cook about 9-10 minutes, turning occasionally.
Serve club burgers: bun bottom, pickles, lettuce, tomato, turkey burgers, 4 half slices of bacon per patty, 2-3 onion rings, sour cream ranch sauce, bun top.
Pass extra rings and sauce at table.