We were planning to try to see the synchronous fireflies this year but there's no room in Elkmont. Does anyone have any recommendations on maybe trying backcountry sites 20 or 21. We do hammock camp so we need enough trees to support 4 hammocks as close together as possible. Our 13 yr old daughter is going so trail difficulty and safety are of utmost inportance. We could go to Cades Cove but not sure about possibilities of seeing the fireflies.