We stayed during the week and it wasn't very busy at all. Spaces are decently spread out, all paved pads, lots of pull-thru sites and some sites on the river (wish we had one of those!). Didn't see the bathrooms so can't comment there. Zero cell reception, which wasn't surprising. However, we had to drive a good 45 minutes to either Greenwater or Pacwood to get any reception. Since we have to work on the road, this was a bit of a hassle. However, if you're looking to unplug then this is your place. Convenient to Chinook Pass and exploring Mt Rainier NP.

Lodgepole Campground is a no-frills national forest campground with well-spaced, wooded sites. It has vault toilets, one water pump and no dump station. The American River is next to the campground. The campground is about 10 miles from Mount Rainier National Park on the Mather Memorial Parkway (Rte. 410). The scenery on the drive to the park is fantastic, just after Chinook Pass entering the park is a great Mount Rainier photo op with Tipsoo Lake in the foreground. At Tipsoo Lake there is the beautiful 3 mile Naches loop trail that makes a great short day hike.
We stayed at this campground because we could make a reservation and it had some bigger sites. Site 6 is a paved pull-through and fairly private. We had no ATT cell service. Access to Mount Rainier NP is not great, the Sunrise area is closest. We visited the Ohanapecosh area as well and loved the "Trail of the Patriarchs" and Silver Falls.