I've camped here many times in the past 4 years. Initially camping was free (no fee required). The past few times (in 2020) the fee had been reinstated and was $10 per day. An additional vault toilet had been added as well as other upgrades like very nice fire pits.
A short section of the south road in from highway 16 was quite narrow because of a landslide but had been partially repaired and was passable.
If you travel the north road from the campground for about 3.5 miles you will get decent service from AT&T but I don't know about the other carriers.
There is some type of well near the entrance to the campsites but don't count on there being water. Supposedly it's ok to drink if there is. Richland creek is usually very clear and could be made potable by boiling in an emergency.
There are many waterfalls in the surrounding area. Cross Richland Creek on the west side of the campground to find a trailhead to three different waterfalls.