Thoughts about my getaway cabin?

I'm designing a 150 sq ft cabin on a mountain in Virginia, for a few reasons. It's fun and challenging. The government doesn't care if you build less than 150 sq feet. Sometimes I need to escape. One day, I may need to escape forever.

It's a place to sleep while I'm cutting firewood. I could learn to hunt, definitely there are some fishing spots. So far I have a planned four walls, two windows, a back door to run to the bathroom (i. e., the woods), a fire, a sing that pours rainwater I've collected.

What am I missing here? What would you put in a getaway cabin?
scaled view
scaled view
Bed and door to the bathroom (the woods)
Bed and door to the bathroom (the woods)
Thoughts about my getaway cabin?
Post Opinion