The Chattanooga-area chapter of the Ducks Unlimited conservation organization is hosting its 5th annual Greenwing event called the Great Outdoors Festival, sponsored again by Sportsman's Warehouse. "Greenwings" (11 years of age or younger) and "Varsity" (12 - 17 years of age) are dedicated Ducks Unlimited youth programs with special benefits. The Great Outdoors Festival is FREE for all and includes a DU membership, plus an awesome goodie bag full of great stuff for the first 300 kids to arrive at…