Mix Cool Whip and Sour Cream. Set Aside. Add remaining ingredients to a large bowl. Gently fold in sour cream-Cool Whip mixture. Cover and chill until serving time. Note if you make this salad early in the day, add bananas just before serving. Per Serving (excluding unknown items): 374 Calories; 16g Fat (38.7% calories from fat); 2g Protein; 54g Carbohydrate; 3g Dietary Fiber; 2mg Cholesterol; 89mg Sodium. Exchanges: 0 Grain(Starch); 0 Lean Meat; 2 Fruit; 3 Fat; 1 1/2 Other Carbohydrates.