This group campground can be accessed by walk-in or motor vehicle. It's a short hike from the Grassy Hollow Visitor Center. It is close to great hiking options, including the Pacific Crest Trail, a summit hike to Mt Baden-Powell, and a hike down to Jackson Lake. Facilities include: picnic tables, campfire circles, grills, bear-proof storage lockers, flush toilets, and drinking water. The temperature in early June was perfect - warm during the day and cool at night.
I stayed here during my PCT hike and was glad to find the campsite. It had flush toilets, water spigots, picnic tables, and fire pits as well as large campsites seemingly fitting for big groups.
When we got there there were a lot of families. It seemed like a safe place for kids to run around and play. The trail runs right alongside the campground, and there's lot of beautiful views of nearby mountains.