The middle is equal parts sleeping quarters and lounge, and even boasts a removable table for mealtime. Which of course you can make on that gas burning stove, which makes the 500 liters of fresh water on board a little reassuring in case of emergencies.
For scheduling, there aren't any set times. Simply tell them where you want to go, and they'll pick you up at the airport, and make it happen.
Aaron Miller is the Rides editor for Supercompressor, and can be found on Twitter. He doesn't understand why you'd drive somewhere just to walk up a mountain.