Loose dogs have always been a issue, for all the obvious reasons. One way we found to combat this problem is to carry a video camera and film the entire indecent. This is the evidence you will need to present to the ranger or camp host. This usually is all you need. No verbal contact is necessary. (It falls on deaf ears anyway) My dog won't bite, my dog won't harm anyone. It's all your fault for having fear of my charging growling mean acting dog. Comments will follow I"m sure. Always do.