Noticed the same thing too while near Salt Fork State Park in Ohio. The folk across from us had 2 kids, parents and grand parents in about a 25' travel trailer. Next to us was about the same except they were in about a 32' fifth wheel. How do these folks fit in their trucks ? There was also 5 or 6 folks staying in a very small class c motorhome. God bless these folks for taking extended families RVing. More power to them.
It's just the wife and I roaming around our 41.5' fifth wheel.
Sometimes that's too small.