Report 3021: Campers hear early morning screams near Calaveras Big Trees

While camping in the Sierra, several members of our group were awakened by  repeated screams very similar to the Klamath and Washington State sound files at bfro.net.  I first  heard the eerie bellowing screams at 4:45AM and they continued until 5:05AM, followed by another short series soon after .  I thought it was over for the night until a short series of screams began at 6:30... from a different direction.  The vocalizations were grouped in a pattern of 4 or 5 "blasts" (lung-fulls?) with a (resting?) pause of a few seconds followed by another series of 4 or 5, a pause, and so on.  This continued with only slight variation for 20 straight minutes; then the two other series mentioned above. While my wife says her heart was "beating like crazy", I was simply astonished. I've been interested in the bigfoot phenomenon for more than 30 years, so I had tears in my eyes as I paid close attention to this almost indescribable sound. To my thinking there are only two possibilities to explain these nocturnal screams: 1) Someone playing high-fidelity recordings at high volume at 4:45AM, or 2) A sasquatch was screaming out  at night in the forests of Calaveras County. Either way -- MANY other campers had to have heard what we did.