I am headed to the Great Allegheny Passage in 9 days and I can't decide whether to take a tent or my Hennessy Hammock.

I typically sleep better in the hammock and can take a lighter sleeping pad (for insulation only) but I don't really know what to expect from the campgrounds along the GAP trail. Are they mostly open and grassy or are there plenty of trees from which to hang a hammock?