I'm not sure why you're trying to egg me on. I tried to drop it and get back to the OP's question.
I've done plenty of things like packed quartered elk out of the hills here, climbed to the top of Mt. St. Helens several times.... lots of things like that, but that has nothing to do with the OP's post. It has everything to do with you thinking you're putting me in my place.
Eating once a day is absolutely the wrong thing to do NO MATTER what a person's goals are. And dehydrating yourself is even worse.
Whether it's a woman trying to be thin, or a man trying to be big and strong or anything in between. It puts the body into a starvation mode and tells it to hang onto every little bit it ingests... and mostly store is as fat while your lean muscle cells are atrophying from lack of proper nutrition.
If it works for you, then just like your full head of hair at 75, you are a genetic wonder and FAR FAR FAR from what would work for the average man.
I worked as a trainer for several years and helped dozens of both men and women get leaner, stronger, and more fit. The number one thing we changed in their diet was having them eat several smaller meals in a day.
It's just like a fire... put a big, fat wet log on the fire (your one big meal) and it smoulders... put a lot of small pieces of wood on the fire and it will burn much, much hotter.
I do things to get bigger and stronger....which is what the OP is shooting for. So no, I have no desire to go on a hike like that with no food or water.