You can now check availability of campsites and reserve online (as of November 2022 for a FEE): https://maps.dcnr.pa.gov/bof/camping/ You can get this as an Google Spreadsheet which you can download: https://docs.google.com/spreadsheets/d/1-d-0SqbKhncJsZrFBQEQdIb860_WrlzrA8WFnAzYNWY/edit#gid=475541885

Allegheny National Forest campsites (shown in yellow) remain free to use.

Update 9/1/21: Fixed a bug which prevented the popups from working on these maps.