Layer the chicken, sausage, onion, bell pepper, celery, okra, rice, and Cajun seasoning into a large resealable plastic bag. Pour the diced tomatoes over the ingredients in the bag. Add 1 teaspoon salt and 1/4 teaspoon pepper. Squeeze out the air from the bag and seal. Freeze until ready to use, up to 3 months. Thaw in the refrigerator for at least 24 hours before cooking.
Pour the contents of the bag into a 6-quart slow cooker. Add 1 cup water. Cook on low until the chicken is tender and the flavors meld, 6 to 8 hours. Season with salt. Serve with hot sauce and bread.
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