When making a reservation, we are quite often asked if we have pets, and when we respond "yes, one dog", we are usually asked the breed. That is a definite indication that the particular campground has a "list" of unacceptable dogs. As someone stated earlier, this usually comes from the campgrounds insurance carrier...they are requiring the exclusion, and the campground has no other choice, except to pay excess premiums.
Luckily we have an English Setter (Oh, and by the way, we now have a new little girl named Tiffy, a poodle-shih tzu mix..what a cutie..pics later) who is never on anyone's "list". Although this is a problem for those with these breeds, I can understand the camground's position...to stay in business they have to stay viable, keeping cost down, and insurance can be huge. Controlling these costs by excluding breeds is one way to do it, and after having our setter attacked by a pit bull IN a campground, I can understand where these breeds get their reputation, deserved or not...JMHO.