Virginia requires all camping be done on the "site" assigned to you. The issue with that is the very nice "pads" do not have trees growing on them, therefore you can't hang.
There are a very limited number of VA state parks that have "primitive camping" available meaning they are in the woods and not located on pads. According to the web site, nothing can be attached to the trees. My phone call was answered with "it is up to the park manager to determine if your straps are doing damage or not but they will error on the side of caution as it is their job to protect the fauna and wildlife inside their park."
Guess that means no hammocks unless you use a stand