You set up as best you can, a semi-camouflaged shelter to retreat to, although a fully concealed one is impossible to create in this area. Still, it should be suitable to spend the night under, although if it rains again like it did before, nothing short of a proper house would protect you... In the process of creating the shelter, you discover more about the area you are in.
The pillars are old, worn, and broken, and covered in dwarven glyphs. In and around the pillars are the remains of many campfires, many obviously very old, but some are more recent--a few weeks or months, maybe. Some effort has been made to keep the campfires from being seen from a short distance away--including from the Old Road. And finally, a knotted rope hangs from one of the pillars near the ravine itself, and descends over the edge.
A quick peek over that edge, and in the dimness of the ravine you can vaguely see a wide ledge about fifty feet below you. Stairs descend from that ledge along the cliff into total darkness, and you can't see the bottom of the ravine. There are also hand and footholds carved into the cliff's face down to the ledge, nearby but much older and more weathered than the relatively recently-placed rope.
By the time you have completed your work, there are only a few more hours of daylight left.