You can make these the night before a picnic or camping trip, and pop them into the cooler on the way out the door! From Quick Cooking Magazine, Sept. 2003
Spread mayonnaise on inside of buns, brush with salad dressing.
Layers all meats and cheese onto bottom halved of buns. Top with onion, tomato, pickles, and lettuce. Sprinkle with oregano; drizzle with remaining dressing.
Replace tops onto sandwiches and wrap each tightly in plastic wrap. Chill, or serve.