When I'm camping, it's dark in the tent. I need a small lantern to gently light my tent, pack compactly, and recharge from a travel battery so I don't need to bring alkalines.

A headlamp would certainly illuminate the inside space, it's best suited for being on your head. A flashlight is great for your hand. And both are too bright on their normal setting.

A note about supports: the cap and the body do not require supports, they'll print fine without. However, the internal tray requires supports.

You can find the full guide for this tent lantern at https://www.learn.adafruit.com/tent-lantern