We hiked about five miles into a small lake and set up camp on a small beach. This was not a heavily trafficked area, and we did not expect to run into anyone. Our first night there, as we were sitting around the fire, we saw a flashlight moving on the other side of the lake around 10:30. This was fairly unusual, however, we did not think too much of it.
But, as time went on, this flashlight kept moving around the lake, getting closer to our campsite… Once it was clear that the person (or people) were heading for our campsite, we moved off into the woods nearby to see who wandered up.
Now, the moment of truth: the flashlight comes near the light of our fire and it is one man. He has a beard and is probably in his mid-40s. The scary part was, he was carrying what turned out to be a pump-action shotgun. He walked around the campsite a few times, and then proceeded to enter our tent. After rummaging around for a minute or so, he came out and started yelling "I know you're out there, why don't you come and say hello?"
My friend and I remained motionless under a hemlock tree about 50 yards away. That is when the man proceeded to fire his shotgun into the woods (not too far from where we were). He also swung his flashlight around several times. After what felt like hours, he grabbed my friend's backpack and a few articles of clothing we had drying off near the fire and threw them in to burn.
Thankfully the man moved off from where he had come after a little while. We waited until his flashlight was on the other side of the lake, ran out, grabbed everything we could fit in my pack and took off (it was now around 2 or 3 am) … We immediately went to the police department and reported it, where we also spoke with some forest rangers. That was it, I haven't heard anything back from the police.