I was surprised at the number of open sites they still had when I made the reservation today. I even got a pet site. In the past, it could be difficult to get a campsite on a non-holiday weekend and impossible to book a holiday weekend unless you reserved it long in advance.
We haven't camped at Keystone since 1987 so I'm sure a lot has changed over the years. One change I've noticed is that more than half the sites are electrified. On my 1987 Keystone map, none were electrified. Also of interest, was the campsite fee- $6.00/night. My camp fees for the three night, Labor Day holiday weekend was $87.50. WOW! Bring back the good old days.
Truthfully, there's not a lot to do there but because of its close proximity to Pittsburgh, it's been rather popular state park in the past. The park is small (1,200 acres) and the lake is too (78 acres). However, It's a great place to put out your hammock and have a "non-laborious" weekend
For more information about the park, click on the link below.
Pennsylvania State Parks - Keystone - PA DCNR