Bigfoot Howling?

This video was taken in the summer of 2008 in the Grey Hound Creek area along the Middle Fork of the Salmon River in the Frank Church River of No Return Wilderness. That summer I was working at Indian Creek as an Native American Interpreter and hiked out to Boundary Creek on several occassions to meet my girlfriend. On this particular occasion I left Boundary Creek at about 5:00 pm and hiked about 10 miles before making camp along the river. At about 4:30 am I was awaken by a very deep howling, unlike I have ever heard. I have heard wolves on several occassions in Wyoming, but this did not sound like a wolf to me. However, the only thing I could think of was that it was a very old wolf with a deep voice? However, it could have been bigfoot. While stationed at Indian Creek one of the River Checkers and myself had a strange experience on night. During the night we heard something outside and the FS Checker locked the doors before we went to sleep - something we never do in the Wilderness but the Checker insisted we do because he heard something make a grinding sound. Any how that night I heard somebody playing with the locks three times and assumed it was the Checker. However, when I asked the Checker in the morning he told me was asleep in his bed all night. I also heard a large tree fall during the night and there was no wind. The next morning when we woke up the mules upstream at Pistol Creek got loose and where running around. Later I found out the mules at Pistol Creek got spooked and broke out. Anyhow, it was a weird night and I guess it could have been some mules pushing trees over and playing with the locks? Enjoy the video. The background noise is the Middle Fork.