I would not trust Good Sam ratings at all. Think there is a lot going on there.
We were at a GS park who announced as I walked in the door that they were one of only two GS 10-10-10 parks in the state. The guy taking me to the site said the same thing.
The site slanted way forward and he told me to park near the front as it is more level front to back. True. But two blocks under left wheels. I drop the 5er and am setting up. E & W there but where is the sewer - at least 35-40 feet at the back of the site. There was no way to connect so we did without for the 5 days there and used their showers.
Our neighbor's water connection was a pipe out of the next to the trailer side of OUR picnic table. And, of course, his sewer was all the way at the back.
All the sites were a mess like that. And G S gives them 3 10's!
Like twogypsies I brought this to their attention and got "Form Letter A" back; doubt they even read my email - just send him the standard email back.