Just because someone doesn't want a party of thirty-some people right by their front door does not make them anti-social idiots. When I go camping, I prefer to either hang out by ourselves, or with our friends. Doesn't mean Im not friendly when walking around, and wave and say hi to folks as they walk by, but it also doesn't mean I want to spend hours talking to everyone I meet either.
It sounds like that KOA was just poorly designed. I don't see that as OP's fault, nor do I find it unreasonable that he would like and expect some level of privacy.
Even the RV resort I stay at periodically in Sarasota Fl, while all small spots, still provides some measure of "privacy". No ones doors are facing each other, and I don't have to worry about someone borrowing my picnic table, or whatever.
It's really not too much to ask for others to be respectful of boundaries. At least it used to not be too much. Now, I guess it is.
Mike