Rivnuts from Homestead, PA on 8/10/2023 10:08:31 AM:
There are opportunities to rig your hammock in many of the camp sites along the GAP and C&O especially if you are flexible where you stay and how you rig it. Along the GAP most of the campsites have first-come first-serve Adirondack shelters or pavilions in which you can rig your hammock even if well-spaced trees are not present. This is not the case at the C&O hiker/biker (H/B) websites.
Well-spaced trees are not universally present in all the C&O hiker/biker (H/B) campsites within, say, 30 yards of the picnic tables and fire rings. However, the wooded areas typically surrounding the mown campsite areas would often offer places to rig your hammock. You may need to be flexible about which H/B campsite you stay at in order to use your hammock. The good news is that the sites are fairly close together to provide real-time options about where you stop as long as you plan to have enough daylight to do so.
I'm leaving on 9/12 for DC from Pittsburgh. Perhaps we'll cross paths along the way.