We stayed at site B19 for one night, Saturday - Sunday, May 20 - May 21. It felt very safe and quiet, but we did experience heavy, steady rain the entire time we were there. I didn't notice any tent pads/ areas that were flooded or held standing water. We were on the outer edge of the B loop and definitely had more space than the inner B loop sites. We were close to the bathrooms but still felt secluded enough (for being close to the bathrooms). The bathrooms were lit up but they didn't feel like an intrusion on our dark evening. Even though we were on the outer edge of loop B, we could easily see loop A campsites, so keep that in mind. The campsites are not next to running water although the campground is. Parking is on the side of the road, parallel to the road, and site B19 definitely did not fit a truck. Neither would many of the sites (too narrow and uneven) Site B20 and B21 did, however. Everyone parking on the road made the campground feel very crowded and claustrophobic. Bathrooms were clean enough and relatively bug free. Sinks were nice and large. No paper towels to dry your hands on.
I highly, highly advise downloading a map of the trails you wish to hike. We could not find the trailhead to Hen Wallow Falls no matter how hard we looked, and that was very disappointing. We hiked to the overhead instead but it was overgrown.