Report 57962: Camper's nighttime howl has possible knock response in Mt. Hood National Forest.

We were camping at Lower Twin Lake in the Mt. Hood National Forest, and after dark, we were sitting around the fire when my daughter tried doing a bigfoot howl. About 10 seconds after the howl, we heard a tree knock. There were no other people camping nearby. There were 6 of us around the fire, 3 adults and 3 kids. It was midweek, and there were no other campsites being used around the lake. The knock came from a ridge high above the lake.