I haven't made it through all the posts yet, but I think this will fit in with what some of the stories you guys are telling.
Myself, two brothers and my step-son were mule deer hunting. My step son was sitting in a natural blind on a water hole and had shot a doe shortly before dusk. He came out and was able to contact the rest of us and we got our tracking stuff and went back to where he had been. We got to the waterhole and started shining our flashlights around to see if we could find blood, eyes, body, etc. I flashed my light back toward the blind just to get our bearings for where the shot had been and saw eyes. I couldn't believe that the doe would have gone back behind the blind. We crept up closer and quickly realized that there were two mountain lions about 10 yds behind where my step son had been sitting. It looked to be an adult and a yearling. I suddenly realized that my sidearm was back up the hill in my truck! We hollered at them and chucked a couple rocks but they definitely weren't scared off. They just turned and moved back a little.
We decided to continue tracking the deer. Of course she went through the only thick underbrush there seemed to be in the area. While we were tracking, we periodically would shine our lights behind us and, sure enough, there were two sets of eyes following behind. We finally found the doe but she wasn't done yet. My step son managed to get another shot in her and we got her dragged out into an open area to get her gutted out. While we were gutting her the cats continued watching from back where the doe had expired. They just circled back and forth a little while watching us. We got her cleaned up and loaded on a cart and didn't waste too much time getting back up the hill and back to the truck! The next day, we went back to find my step sons arrow and to check the gut pile. The cats had moved it back into the brush and piled it up again. It looked like it had been gutted right there. Nice, neat pile...no bloody drag marks, nothing. It was really weird just how neat of a job they had done.
We have seen cat tracks in the past and since that hunt but have never seen another cat. It makes you wonder just what is watching you when you are walking in and out of your hunting areas in the dark!