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.
On my many times on this trip, it seems that fully half of the tour group is comprised of Boomers. The best time was when the main guide was a music professor working the caves for the summer. She was in her fifties. My first thought was that the trip was going to be lame because of her age. She showed me and everyone there.