How to use Outdoor Retreat and make it interesting?

Use the Haunted and cursed traits, plus a third negative one of your choice.

Then turn it into Haunted woods.

I turned it into a copy of Camp Crystal Lake with tunnels and thick trees and bushes and right in the middle, a place to tell spooky stories about the little boy who drowned in the lake when cruel children took the ladder away, and have your chest and nuts roasted on an open campfire.