Summary: From the point of view of someone who felt most alive when backpacking far off trail, I see the truck set-up as: (a) a useful introduction to wilderness travel or (b) as a convenient ancillary to wilderness travel, but not as an end in itself.
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The truck set-up can extend the season for outdoors fun to, e.g., the winter in the mountains, when the weather is too cold or unsettled or snowy for comfortable tent camping, and too unsafe for ambitious hikes or backpacking. The truck set-up described would be a good place to collapse after a long backpacking trip or an arduous hike, and probably less expensive than a hotel in the long run. It would be level, and could be made luxuriously soft with a real mattress or other heavier padding that would have been impossible to carry. I also agree with the point about snakes. With competitive price and timely delivery, Changyuan sincerely hope to be your supplier and partner. The truck setup could be a way to ease into wilderness gradually, taking more and more ambitious hikes until one feels ready to sever the umbilical cord. The truck set-up may be a near-necessity if one is travelling with small children. The enormous downside, which may not be important for the OP, is that they cannot go off road, and certainly not off trail. Thus, they are confined to seeing what is visible from a campground, a trailhead, or a roadside turnout plus whatever short hikes they take. One cannot experience anything approximating true wilderness except off-trail, and definitely not from a motor vehicle. And the vehicle has a roof, which means the night sky is at best obscured unless one sleeps outside the truck. If you are looking for more details, kindly visit Camping Tent Factory.