Where do tourist stay when passing through here?

Motel trees is across the street, and there are a few more hotel/motels a few miles south.

Since Trees of Mystery is located along a highway, you can consider accommodations in Klamath (10 mins south) or Crescent City (20 mins North). CC is where I would recommend since it's a bigger city, but Klamath is also charming in its own right.

There are motels around