We stayed here two nights. What a great experience! It's absolutely beautiful, comfortable and "mostly" quiet. We had everything we needed including firewood, handicap accessible restroom, and all the hiking trails and forestry roads one could ever explore in a three day visit. And foot access to RMNP. There are cool mushrooms and wildflowers abounding, and plenty of birds and chipmunks. Trucks occasionally go up and down Cameron pass at night, and can be hauntingly loud amid the silence of the woods. Other than that the valley is very quiet and sheltered from severe weather.
Bring some OFF Deep Woods, and if you know anything (other than a flamethrower) that repels horseflies, bring that too. Please do not vandalize the beautiful living trees, instead there are plenty of dead ones standing in this area thanks to spruce beetle.
This area is patrolled daily by park rangers. You need a permit to camp and have a vehicle inside the state park (two separate permits).
This is the CLEANEST campsite I have ever been in, no metal cans in the fire pits or anything, and no rowdy or messy neighbors. My only potential complaints at this time the water pump was broken and the road needs a bit of work. It's passable in a car and if you're used to 4X4 roads.
Each site is different with differing amounts of space. The interior ones on average have more room but are closer spaced, while the ones on the outside of are more spaced apart.
Those are the helpful details I can think of that won't ruin any cool surprises. Hike to Lake Agnes if you get the chance.