My dad drove a truck for a livin'. I've done a moving job or two in the driver's seat of a civilian version of a moving truck, and spent even more time locked in the back of one, and honestly, I don't get it either. They park in the perfect location for a bless'ed collision. Here in the US, the parks system used to have rest stops running up California. The east coast has very different roads, and more built up off ramp locations. Sadly, many of the California rest stops have been torn out. I had to iron bladder the last six of a 24 hour drive, and I was a bless'ed idiot to drive that long straight, but the lift gate was busted and would not latch. I also had my bank card shut off in the bless'ed Mojave on the 4th of July trip, but that is a whole nother story.