This was by far the best campground I have ever stayed out. We came here after ditching Fairholme campground because it was too noisy. We showed up at 11am on a Friday and half of E loop was empty. We stay in site 91 which is nicely tucked at the end of the loop away from the road and other campsites.
The site itself has excellent privacy from other sites around. The loop was 25%-50% and we felt like we were alone. It was so quiet we could sleep without the noise machine we needed at Hoh and Mora campgrounds.
You really feel like you're in the trees. You are far from the restroom which is shared with C loop. Be aware that there were a ton of mosquitoes so bring bug spray or a candle.
Another pro is you are 20 minutes from Hurricane Ridge and 25 minutes from Hurricane Hill. Right now the road to Hurricane Ridge is limiting the amount of cars up the top. However if you stay at the campground you get to go up ever after the road is closed to everyone else.
You are also 15 minutes from Port Angeles if you run out of supplies.
Honestly would recommend 100000%