Ok, I'll share.
I've told the story .. Aug 20-ish, 2011. Backpacked with a friend into a lake basin. We were beat so we just took the first spot we found the first night. This picture is from 2018, just shows the camp site. "They" came above to the right. The knocks were (1st) directly above to the right, and (2nd) somewhere farther to the right about 75 yards from camp.
My tent, shown below, would have been just left of the fire ring and little beyond it, my buddy's larger tent filled the opening on beyond that just this side of, and left of, the big tree on the edge of the campsite.
The next morning wandering around, I found a better camp site about 200 yards from the first. This is my spot for the second night. The bigfoot that came into camp stood about where the rocks are to the right / away end of the tent. When I got up to pee, and again to check my pack 'cause I thought I was hearing rodents, it was RIGHT THERE ... I couldn't bring myself to flash my light that direction for some reason.
The "tent" is a Cabela's Northstar Bivy, long discontinued. It's about 90 inches point to point lengthwise, 30 inches wide, and 18 inches high. My shoulder brushes the roof when I roll over but there's a lot of flat space inside for gear other than my pack. The pack is a roughly 1980 vintage Kelty Tioga II which I still use for my heavy hauling. Directly behind me about 15 feet is the fire ring and just beyond that is my buddy's camp spot.
The following year, Labor Day weekend, 2012, I did my "death march" and wound up camping in the same location after 13.5 miles. I did that hike solo and camped in the spot he camped the year before.
Different pack. In 2012 and 2013 I used a "Sacrifice" internal framed hunting pack from Badlands for backpacking. It has the advantage of a lower center of gravity and the suspension is adequate for lighter loads. The "tent" this time was a ground sheet and REI "Bug Hut I". I also had a new Western Mountaineering MityLight sleeping bag and a Thermarest NeoAir pad. The fire ring is just out of sight below my left elbow as I took this picture. Nothing happened this night, but during the death march around noon I got the "ahhhh" recording I sometimes mention, I found a track in the trail mid-afternoon, and in the morning when I got up here, I recorded the only whoops I've ever heard. One of those whoops elicited a 2-syllable response., so yeah, whoops.
So it's a little off topic, but the pic below shows something interesting. The bare-ish patch on the point across the river , left of center, is where I think the "ahhhh" roar came from because it is the nearest point above me in the right direction and there is a similar, though more pronounced, outcropping where the first one came from. This is at 10x magnification so distance is deceiving, it's over 2 miles. Oh, and the swamp where I found the funny turds 2 years ago is just out of frame to the lower right side of the picture. There is no sane approach to that outcrop from this side of the river, have to go from the other side about 2 miles off-trail. I ran trail cams on it for a couple seasons. One died. I have new cameras and plan to go back this summer for another try at figuring out what made that sound.
MIB