Here's how the National Park Service responded.

[Starryart]

Besides being a PUP owner, I also own a small log cabin in Colorado between Crested Butte and Gunnison. Three years ago we had a very agressive bear wreaking havok in our area. He clawed and ripped a heavy shutter that we bolt over our door while we are away. We found it on the ground-wrenched off the hinges. The shutter is made of1x6 s and 2x4's and is... uh.. was very heavy duty. Luckily he did not get inside at that time. We think he was scared off.
   Then the bear broke through our neighbors kitchen window while they were away and ransacked their place, pulling cabinets off the wall and turning over a large refrigerator. In all he broke into 5 cabins in one months time.
  True a PUP would be quicker to rip up than a hard sided rv but a thin aluminum walled camper is no match if a bear truly wants inside.
   MMmm... what about those old Apache pop up trailers that have the folding hard sides. Do they count as a hard side RV? Just a thought....

[uchwear]

It was here, it was actually before PUX came into existence. It's funny because Dave & I have had conversations regarding dollars spent by pop up campers vs. Class A and he has been told exactly what you said by campground owners. Pop up campers tend to use the store and other amenities more while Class A campers tend to stick to themselves.

Also Class A campers tend to have two air conditioning units and use much more electricity costing the campground more money.  Typically folks who can afford Large class A campers don't conserve energy because they don't have to.  Even a popup that is connected to electricity doesn't tend to use much electricity.