Not all such panels are created equal. The one in my Subaru feels like plywood. (I'm not peeling off the carpet to confirm this.). The one in my wife's little Honda is comparatively flimsy.
I'll trade you, my car and my load of wood for your truck and a load of wood...straight up. I'll even deliver, I'll be out your way next week picking my daughter from college for Christmas break, come to think of it you can skip the wood I'll prolly need the space.
Wish I had gotten a few pictures of the misses' mazda 6 loaded with pine. That was a sight to see, her car and my car filled just about got us through February and March into April.
The family sedan loaded up with logs to keep warm is one thing, I parked next to this car at Mc'D's last weekend. I just don't understand some folks.