Forest Service Campground - First Come, First Serve & hosts

I'm with the others in calling the FS office. We often go in to a campground and pick a site that's open, then check with the host on when the other more desirable sites will be open, then move. If you have a good host, they will work with you and come around to tell you that the current occupants are about to leave so you can go over and grab it.