Kurt and Ray, been a fan of your guys' trucks for a while, very thoughtfully done.
For me when packing for a multi day backcountry trip with the family my roof rack + $45 canvas flat-storage bag, has been a life saver. I try to keep lighter bulkier stuff up there but have carried 8gals of fuel and 5 gals of water up there too.
That and the quick and dirty storage platform I built a a while ago has been indespensible for storing tools, recovery gear, stove, axe, shovel etc.
It's important to maximize the use of the given interior and cargo rooms especially when throwing stuff (stuff that can cause serious injury in an accident) in the back seat area is not an option for those of us who travel with kids. I've recently also added the seat back and visor organizers along with some reorganizing of the iPad, iPod, gps, ham radio and cb mounts. It's a constant work-in-progress but fun