The dark campsite sounds scarier than it is. Most of those noises are just leaves.

Your imagination gets more active in the dark because less information is coming in, so it fills the gap with the worst option available. Every rustle gets assigned a large animal. The noises themselves were always ordinary, and the size of the fear measures how little you can see rather than how dangerous the place actually is.

This applies well past camping. When something at two in the morning feels enormous, note that you are working with the lights off. Get more information before you decide, and where you can, decide in daylight.