I've got a tonneau cover on the back of my R/T Dakota, and used need to travel on a moments notice, so I always kept a travel bag in the back ready to go.
I also lived a good hour from work, so in order to hit the popular silicon valley bars late on Friday nights, this in turn led to keeping sleeping bags and a foam mattress in the back so I could just crawl in the back and sleep it off, which saved my ass on many occasions. I always had my bag at the ready to freshen up in the morning and a fresh change of clothes.
The local cops would check cars, vans and toppers in the parking lot for drunkards, but never suspected I was passed out cold all comfy underneath that tonneau.
The next morning the sun would come up and around 10 am it would become unbearably warm inside. I'd open the lid and sit up with hair all crazy, while little old ladies walking around with shopping bags would look at me in horror.
"G'morning!" I'd say… and they would scurry off clucking like chickens…
And I wasn't always alone under that lid either. Good times.

I have no idea what you're talking about.
I've always found waking up in a truck bed preferable to waking up on the ground.
/former & future pickup truck owner, and (consistent, temporally) beer drinker