Henkel says he was about the 20th paying customer. These expeditions are not geared, Henkel cautions, toward novices. The shortest is about 150 feet deep. Participants are required to verify capabilities and physical condition in advance. There is nothing else to do.
Accommodations are spartan.
There is one small lodge, and the only furniture in my room was a twin bed and dresser. There was no lamp, no side table, no pictures on the wall. You can get soda and little cans of food at the one country store, but it's seldom open because the man who runs the place usually is gone fishing. All food must be imported. But meals are good.