South Carolina children who need immediate, around-the-clock psychiatric care risk being stranded for days — even weeks — waiting for help, only to be sent hundreds of miles away from home for treatment. When no psychiatric residential treatment beds are open in South Carolina, some children must travel across the Southeast to facilities in Florida, Georgia, North Carolina, Virginia, Tennessee, Alabama, or Kentucky — anywhere a bed might be available. The problem in South Carolina isn’t a shortage of psychiatric residential treatment beds, state agency leaders say, but that so many of the stat…