In the book, (and I assume it is also online) is their ratings scorecard. It is a scorecard almost entirely composed of factual items that relate to whether or not an amenity exists, not whether or not it is particularly nice, necessary or useful. Several things that get points are things like a pool, a sign, a manned office, fenced for security etc. It doesn't allow for an opinion if the pool is large, the sign attractive, the office staff nice or if that fence is a classic wrought iron fence or quality rail fencing or if it is rusted barbed wire. If you were to score the park exactly as called for by the scorecard, leaving your opinions at home, you will generally get a very similar score. The scores are not meant to score the appeal of the park, it is meant to score the amount of the amenities.