You are pretty true about storage, I've had a FWC for 10 years now, & storage is the issue, i solved a good portion of it by getting a newer truck with an extended cab for dog stuff & gear (plus a place for the dogs to travel) & since you haven't got the truck yet, you have that option.
dry food storage is a big issue, i have a large storage compartment up front, under the front window, but when traveling, where do you put the bedding, on the bench? what about fire wood?
i'd make a thorough list of what you'll be bringing first, then try to figure out where it all goes, it gets tight quick, because you can't leave anything up high (like the bedding, this takes up alot of space when down)
& although i agree with the back porch idea, i find the only way to work with these short doors is to climb 'up' through them, the best way to test this is to climb into one on the ground, you'll see, I've got a step that flips up when not in use, which is attached to my 2" receiver, & i use it all the time just as a truck, to lift things up into the bed.