I'd recommend this tour to anyone of any age with a sense of adventure. I could conduct the interview by either telephone or e-mail. My favorite is the Wild Cave Tour at Mammoth Cave National Park. It involves just what the name suggests. It stops short of any rappelling or belaying but is a worthwhile trip nonetheless.
Groups are limited to fourteen for safety reasons.
The group has to work as a team to negotiate several obstacles along the way. While this trip is open to anyone it is NOT for everyone. It's strenuous,damp and dirty. Physical fitness is required. The best time was when the main guide was a music professor working the caves for the summer.