People also have a strange idea about the behavior of their dogs on narrow trails. Numerous times I have encountered a leashed but snarling protective dog. I got the typical, don't worry, the dog won't bite. Somehow they lose confidence in the dog when they learn the dog will only bite once, then it will be dead. I even had one dog attack me next to my campground picnic table. The owner somehow thought it made sense to blame me when the dog broke its leash and attacked.
When you take a dog camping, you really need to think it through. Your trip may be spent sitting around the campground dog sitting.