I realize that is true in some situations, such as various privately owned campgrounds. However, in the case of public parks or county fairgrounds, it's normally the autocrats (groups?) decision to ban all dogs because of one or two misbehaving at the prior years event. I have emailed an autocrat in the past when this happened at an event that was held at a public park. The park is a well known "dog park" at that! The reason behind the "no dogs" on the site restriction was because a couple of people couldn't control their animals. So, rather than controlling the owners, the group decided to ban all dogs...from the dog park.