I don't think the resistance to socializing is isolated to just RV'ng. On my entire block where I live only two other people besides me are ever out and talking. Everybody else just parks and goes straight indoors.
I'm a social person and like to talk to strangers. But many times people, even when outside the camper really don't want to talk.
So if I see you outside I might say hi as I walk by. If I see you again then I might stop at the road and say a few words to gauge if you really want to talk.
Here's something you can try when camping. Instead of just sitting at the table or in a chair by the RV, move your chair closer to the road. I'll bet that gets you more people stopping to talk. To me that seems to be a universal indicator that you are willing to talk.
