I worked on the Gallatin National Forest from 1978 through 2007. I was in the Engineering office in Bozeman, but I regularly worked with the people on the Districts.
The biologist on the Gardiner Distsrict (which is just north of Yellowstone NP) was also in charge of that district's trail program that included many miles of trails in Absoroka-Beartooth Wilderness.
As the District wildlife biologist he was very interested in the grizzly bears in that area, so he supplied his trail crews with zip lock plastic bags and had them collect all of the bear poop that they came across doing their trail work.
His office was in the basement of the Gardner Ranger Station, and he had a cafeteria size table in it that was completly covered with sacks of bear poop that he would later study.