One of the huge advantages of seeking a sleeping spot in the dark is discovering any of the huge numbers of wonderful sleeping spots that you'd turn up your nose at, if you could see better. This experience may introduce you to a whole new way of looking at sleeping on backpacking trips! This applies mostly if you're cowboy camping, or with a small tarp or a tiny-footprint, low-height tent.
I mostly don't think of "camp" sites any more, just "sleeping" spots. Put that traditional idea of a broad, tramped-down-to-concrete clear area out of your mind and think of simply lying down to sleep. Amazing how small an area you really need. Much of the vegetation will simply cushion you, and spring back none-the-worse the following day.
The big problem in the Whites is NOT legal and reasonably flat sleeping spots. The problem, particularly once spruce takes over, is that the spots have little headroom or "moving around" elbow room. So you eat elsewhere, a good idea anyway. I just cook & eat right on the trail. And once you've cowboyed down for the night you may not have much room to rig your tarp or pitch your tent if it starts raining. I can't claim that is any fun at all. With a tarp it's not usually bad in a mild rain, you kind of drape it on the spruce rather than pitch it. If the rain turns torrential, and/or with a more elaborate tent I admit you're in for a bad experience and maybe a tarp or tent that will tear and need to be replaced. But that happens so seldom I believe this approach is useful.
