Well its bad news. I just called the Golden Gate Canyon State Park (303) 582-3707 and asked about using hammocks in the park and it is a NO GO. The lady said that there can be nothing attached to trees in the state park. So we need to find another place to do this. I haven't been here a long time so I am not super familiar with a lot of areas here so I am not much help with this part of it.
You guys are quicker on the draw than I am and already answered. Sorry.