This is true.
6 or so years ago I set up a little cargo trailer that I already owned as a camping trailer for airgun weekends.
View attachment 556086 This is the only photo I can find. At that time, I had a cot for me to sleep on, and my son wasn't too tall to sleep the other direction, from side to side. So I suspended a bed for him to sleep in. It worked great, and I occasionally still use it, when there's gonna be a bunch of rain in the forecast for a match weekend, or when it's supposed to be really cold (I put a tiny wood stove in it), or when we're camping where there's bear activity. Yeah, seriously. Just feels more secure than a tent, although I'm sure they could get in if they wanted to.
But mostly, I shifted to tent camping, just cuz it's easier and more convenient than hauling a trailer. And tent camping works great for the summer field target weekends.
For urban camping, like Walmart parking lot or rest stop type stuff, the little cargo trailer would beat the pants off a tent.
If I was gonna get very serious about traveling long distances for matches, I think a camper shell on a pickup wouldn't be a bad way to go.