We've been RVing on a regular basis for almost 7 yrs. now and have driven our motorhome 65,000 miles. I have to say I just don't remember anyone invading our space (maybe my memory is going?) LOL.
The one thing I like about RVing and campgrounds is that, generally, they have the most friendly easy-going people. Some people like to keep to themselves and others are more social. We are kind of in the middle.... We'll chat and visit and then let you have your privacy, etc.
Since we have a full-size motorhome, we normally stay in parks designed for larger RV's so no real issues with being cramped.
MM.