Welcome and nice truck.
I'm with noseoil, plan on allocating some of the under bed/bunk bench space to a pull out drawer at least for a chuck box, if not a working galley. At least that is what I would do for my intended style of camping. The other bunk bench could have outside access to store folding chairs and shade tent, door mat, and other outside stuff you won't want to drag thru the inside.
Again, this assumes that you will want to be outside for most of your camping activities.