@Bobbi-Jo1
I don’t think you have to say anything about beds and bathrooms. There will be as many as the guests bring with them.
Your listing is up, it’s a beautiful spot, and hopefully people have enough sense to know what “off-grid” means.
It would be wise to elaborate though.
No electricity.
No running water.
No wifi.
No cable TV.
No sewage system.
Nothing other than that which you bring with you.