First - this is closed for the 2020 camping season due to Covid 19.  Also, NOT to be confused with Mt Greylock Campsite Park, which is a private campground with hook-ups outside the park.

The Sperry Road campground offers a mixture of group and individual campsites as a reward for a short hike from the campers parking lot or down Sperry Rd. During the winter you can access it via snowmobile or skis. Sites are large and generally secluded, each offering a bear box set apart from the campsite itself as black bears live in the park. There are a one or more clean, centrally located composting toilets in each section.  The Chimney Group site provides a large lean-to, a nice respite if you're caught on a rainy weekend! Upper Group and Stoney Ledge also have lean-tos. The group sites accommodate 5-12 people. There's a large picnic pavilion midway through the campground, too. 

The campsite numbers are on the bear boxes. 

Depending on the time of year, there are a couple of nearby waterfalls a short hike from the campground. Trails also leave here and head to the summit of Greylock or to the Stony Ledge Overlook.