I’m going to stay out of the vehicle debate and comment on your description of the camping setup. You mention the Decked drawer/platform system and the AT Habitat, both excelllent choices. The Habitat uses a traditional style truck shell hatch that swings up. The Decked system is about 12” tall and stretches across the entire width of the bed. To enter the Habitat from your dropped tailgate you’ll probably have to crawl through on your knees under what is now a smaller vertical spacing...and that will get real old, real quickly. A setup that maintains some sort of center aisle will facilitate easier ingress/egress as you climb/duck into the back of the truck bed. I fight this issue with my “hi-rise” camper shell all of the time, even with the taller opening. You know, smacking your head or scraping your back. Check out the cabinet/storage offerings from AT and Goose Gear; both companies offer excellent products. But...quality comes at a price, or you’ll learn how to build what you need. Looking forward to your build!