In a large saucepan, bring the water to boiling; stir in uncooked wild rice and barley. Return to boiling; reduce heat. Cover and simmer about 40 minutes or until wild rice and barley are tender. Drain off liquid. Transfer wild rice and barley to a large bowl.
Stir in pea pods, golden raisins, green onions, the 2 teaspoons orange peel, the orange juice, oil, salt, and pepper. Cover and chill for 4 to 6 hours. Tote salad and mint in an insulated cooler with ice packs.
To serve, stir in mint. If desired, garnish with additional orange peel. Makes 12 servings.