Screaming or howling in Gallatin County, Montana

I was a part of a 3-person research team collecting data from the forests and meadows in the Greater Yellowstone Ecosystem. We had hiked quite a ways in, surveying study sites along the way, and then hiked further to where we would start surveying the next day. We set up camp here, ate our sandwiches and climbed to the top of a big hill to enjoy the scenery lit up by the full moon. In a moment of silliness (and stupidity), we all 3 started howling at the moon. When we stopped, something howled back at us. We were all terrified and literally peed our pants. It seemed to be really far away, yet really REALLY LOUD. We tried to figure out what it was, but none of us could identify it. Then, we were trying to figure out what we should do. Should we stay up? Should we all get in the same tent? We certainly weren't going to hike back to civilization in the dark! We ended up each getting in our own tents and just staying awake all night keeping vigilant. Never once did the idea of sasquatch enter my mind.. because at that time, sasquatch was not a "real thing" to me, and I had a real problem here, so why would I even think about some folk lore legend? But the memory of this terrifying night has never left me. Recently, I found some very compelling interviews and stories about sasquatch which brought me to bfro.net. I started clicking on reports from states and counties where I've lived (Kansas, Missouri, Tennessee, Texas, California, and Montana). When I saw that there was an encounter from the exact time and place that we heard that thing scream at us, my jaw dropped and I thought "WOAH!!!" I'm grateful that we didn't see it, because I think that would have traumatized me for life. Instead, I just have a lasting memory along with a scary campout story. My heart goes out to all of you who have had terrifying encounters.