Explaining RVs/campers to people who just don't get it!

Pre-RV days... About 10 years ago my wife wanted to go tent camping. We went to a campground in the mountains. While getting our camp setup, we watched a couple people pull into the campground with trailers and set them up. They took bikes out and the kids starting riding them around. They turned on music and setup chairs, started a fire, and sat around.

I was totally baffled that people did this. I wondered why they didn't just stay at home and hang out in their backyard.