"Content is only available to subscribers".... doubt that I'm missing anything though. I remember there has been a handicap-accessible trail in Byrne State Forest ever since it was called Lebanon State Forest, back in the 1990's.
Enos Pond County Park, in Lacey twp., has a half-mile compacted stone dust trail designed for wheelchair accessibility. The trail also features an interpretive brochure and map. It's more maritime forest than barrens, but is within the National Reserve.