I have absolutely now input on caves in southeastern U.S. But what I do have is a story from way back when we took our boys to the wild caves at Alabaster Caverns State Park in Oklahoma. There are about six wild cave, those that are not guided by state park personnel, and a couple of them are pretty difficult. The last one we did each time had a low pass where you had to go under water to get through. The boys absolutely loved it. We kept pics of them on our webpage after coming out. They were covered completely from head to toe. I mean they looked like they were dipped in chocolate. That was usually the month we had the most hits on our webpage indicated they were telling people about it. Yes we did a couple rapelleing a year, but the caving rally seemed to get thier attention. Just my two cents worth.