Libety Nationals stacks a bunch of Mats in the main floor. At least 12 or 15 I can't remember the exact config.
This is going to be a touch weekend to pull many good kids however. It's scheduled on the same weekend as USA Folkstyle Nationals in Cedar Falls, IA. I can see the Jr. division maybe being a better draw here but I would think the top tier kids wrestlers especially from far away would lean towards Cedar Falls as it's more established. In either case they will both suffer I would think being on the same weekend.
24/7