I think this topic has come more from the psychological bents of the OP more than the reality in the camping/RV world.
If you're anywhere close to being self confident and self assured you'll make comments to complete strangers and judge the reaction. The result is almost always positive. Example: Today in SE Michigan we got a dump of wet heavy snow. Even the Grocery store parking lots were un-ploughed... Going in and out of the store I spoke to people I have never seen before with the phrase "Nice weather if you're a Penguin"... In both instances the responses were friendly and positive, (or negative depending on how you see deep, wet snow ;-) )...
It's the same in the campgrounds. Be friendly, approachable and familiar and others will be the same. It's easy to appear to be unapproachable but it's also very easy to approach. The problem is probably more the reticence to approach than the approachability of others...
Your way of dealing with others is reflective of how others see and deal with you.
