Private Arch is a very apropos name, considering this was far and away the least crowded arch I saw in the entire park (full disclosure: I never made it to Tower Arch). The fact that this arch is found on the Primitive Trail rather than the Devil's Garden Route means that the only people visiting this spot are seasoned hikers trying to tackle the Devil's Garden/Primitive Trail Loop, so you'll be treated to much smaller crowds (there was no one there when I visited) and a low likelihood of selfie sticks and people taking hundreds of pictures of themselves standing inside the arch. Worth a quick stop if you're trying to tackle the loop