Can you explain what this might possibly have been? ?

Last September, my friend and I (and my dog) went camping near Sisters, OR. We eventually settled on a spot up an abandoned logging trail, miles from civilization. We were barely able to get our truck up there because the bushes were so overgrown on each side. We set up our tent and built a fire (after some travail), but from the moment we set foot outside the vehicle, we each had a strange feeling, like someone was watching us. We both felt it, but didn’t say anything about it. Later that night, after it had gotten quite dark, we were reading stories in the tent when the dog started barking ferociously (and he’s not a yappy dog; he barks very rarely, and only when he feels threatened). We were instantly terrified out of our minds and made like a thousand plans of what to do. The dog eventually calmed down, but it was short-lived. After maybe five minutes, he started barking frantically again. We eventually settled on trying to get to the vehicle, and waiting till morning when whatever it was left (we didn’t want to leave all our stuff). Once the dog calmed down again, we scrambled haphazardly to the truck and jumped inside, pulling the dog in behind us. Since it was a small cab, we tried the best we could to accommodate ourselves for sleeping, but it was really uncomfortable. Hyped up with a major adrenaline rush, and freezing to boot, we were unable to fall asleep until about 3:00 a.m. At around 5:00, we were all in a dead sleep, when suddenly, at the same time, we woke up. We noticed at once that it was frigid, pitch black outside, and there was a thick fog enshrouding everything around us. But what attracted our attention the most was a large, round, red light (about the size of a basketball) hovering about six feet above the ground, floating smoothly towards us at a measured pace. It came towards the truck head-on, then moved aside on the left, ping within inches of the window, not illuminating anything at all. (We ducked down, trying to stay hidden.) After the light ped the truck, making absolutely no noise at all, it vanished. The dog was so scared that he couldn’t bark, but he was trembling so hard he made the truck shake. We can say with certainty that we have never been that scared in our entire lives, and the experience made us acutely paranoid for weeks thereafter. Though we were terrified, we decided to wait it out till morning so we could get the tent. Needless to say, we had no more sleep the rest of the night. When it grew light, we jumped out and loaded everything up with lightning speed. (Actually, we sent the dog out first to investigate. He sniffed along the exact path where the red light ped. We looked there as well, but saw no footprints of any kind.) Once we were loaded up, I started the truck and we shot down that rugged mountain road at breakneck speed. We didn’t slow down till we were safely home, and we were exhausted and extremely disturbed for days afterwards. What do you think it is we saw?