Cook the bacon on medium low until crispy. Remove bacon and pat dry to remove excess grease. Discard drippings. Crumble bacon and add to an insulated soup pot with the onion and one tablespoon butter. Cook on medium low until onions are translucent. Add the clam juice from the clams, but reserve the clams for addition later. Add the diced potatoes and cover, stirring occasionally until tender or the clam juice is completely absorbed by the potatoes (about 10 minutes). Add milk, cream, soup, remaining butter, kale and dill weed. Stir frequently for about 20 minutes, then add the clams and crab and simmer for ten more minutes.