When children first come to Camp Oo-U-La, they’re often wearing long pants, a long shirt, a hat — anything to cover up.They’re used to hiding their burns.But at the summer camp put on by the Georgia Firefighters Burn Foundation at Fort Yargo, they feel free, said Angie Roach, a former Hall County firefighter who herself was burned in 2007 while on the job and who now volunteers with the foundation. “It’s amazing — within a day or two these children are running around in their bathing suits. All their scars are showing,” Roach said.