This is great dispersed camping. The start of the road has lots of “no camping” signs, but once you pass the Apache Stables there are dozens of spots. This was a popular location when I was there, but if you keep driving far enough you’ll find a spot. I had to go 2 miles in I think. Lots of large and small spots, I saw many larger rigs like school bus conversions and trailers. The road is well maintained. Pretty densely forested with plenty of room between spots. It was very quiet. The stars are amazing here! And you are so close to the park! Decent cell reception depending on your provider and town is very close by.
I arrived late in the evening and left in the morning. It was a nice place to make a quick stop. There were some ATVs in the area and some traffic on the road from construction vehicles. Pretty close to the highway but I wasn’t bothered by noise. The spots that I saw near the start of the road looked spacious and lightly forested with a good amount of room between neighbors. Easy to get to, close to the highway, accessible to all vehicle types, and quiet enough.