I would love to camp at Fort Wilderness. I would love to experience Disney during the holidays. I am just worried if it is actually doable. We have a pop up and have done late fall camping here in Indiana. It does have a furnance and we used a little electric heater as well. That combined with Solar Gizmos kept it in the 70s inside when the temps dipped in the 30s overnight. How cold does it get in Dec. in FL? Would camping in a pop up be doable?