Shrimp and Okra Gumbo

Name: Shrimp and Okra Gumbo
Ingredients: 2 pounds medium shrimp; 1 pound crab meat-lump or back fin (optional); 8 cups Shrimp Stock (`); 1 cup vegetable oil; 1 cup all purpose flour; 2 to 3 Yellow Onions (chopped); 1 to 2 Green Peppers (chopped); 3 to 4 stalks Celery (chopped); 2 or 3 bunches green onions (chopped); 5 cloves garlic-chopped; 1 pound cut okra; 2 tablespoons chopped parsley; 1 tablespoon Oregano; 1 tablespoon Basil; 1 1/2 teaspoons Thyme; 1 teaspoon White Pepper; 1 teaspoon ground black pepper; 2 teaspoons kosher salt; 2 bay leaves; 1 tablespoon Creole seasoning (plus some for shrimp); 1 teaspoon cayanne pepper (optional)