Elk hunters encounter large animal and hear vocalizations near Rimrock Lake witnessed in Yakima County, Washington

I was camping up at Rimrock lake on the far side , there's an elk camp up the road on the n.e. side where a river enters Rimrock resivor , any my son and I used to camp up there a lot because it's out of the way of the main campgrounds and people. In 2007 we were camping and it was late at night and there's a few elk and deer trails that come through the area so we were used to early morning and evening activity from them. One night about 2:00 a.m. after our fire had died down and we were sleeping we heard knocking noises in the distance , then it slowly got closer and louder , I don't know why but after seeing so many Bigfoot shows and stories I wanted to see if it there was any truth to the knocking communication , so I got out of my tent and found the biggest piece of wood I could handle and started knocking on a tree , I did it in sequences of 3 knocks per time and sure enough I got an answer , just to make sure after a couple of hours it stopped so we hopped in the truck and drove down to where there might be other campers but the public sights were empty , there was no one around for miles , just the ranger station and a few summer houses at the end of the road. So with that in mind I was pretty sure we had an encounter , I have been back several times over the years but I don't camp there I just get an eerie feeling being there , I haven't ever shared this with anyone , I am glad to see that other's have had sightings and have heard things up in that area , it's really not far from Randle and camp La Wis Wis