The above gps track has almost every exist campsite with fire ring and stream crossing.
You should camp where others have before to minimize impact. Please dont go trash a new area. Besides, the existing ones are in the flat spots, which are not that common.
Also, check out:
For everything you need to know.
I would suggest parking at the Winding Stairs trailhead (FS106 east) regardless of direction. This trailhead is off the main hwy, but gets a lot of traffic. WS is very popular short-hike destination
If May keeps the pattern so far this yr, it will be HOT and the bugs will be coming out. There is not much shade on the ridges, and they get warm during the day. Its already pushing 90 some days.
Main thing you need to watch is the weather and water level at Little missouri @ langley guage Under 4' and your good. Over 5' and your not getting across (and living to tell about it). A single thunderstorm can spike the river and creeks and strand you, so have a bailout plan for the worst crossings, and plan the direction to go, and where you start and park, with the weather forecast in mind. Once on the trail, you dont have cell service except on top of Eagle rock vista. The advantage of WS trailhead is if its low but might rain, go CW and get deepest crossing out of way first. If its high and going to clear, go CCW and save it for last after river drops some.