The problem I have with Pelicans for kitchen kit and the like, is you have to turn them on their side to move them, and if you don't have everything packed in tight they slosh around .  (egads!!  Did I just talk out AGAINST Pelican cases!!?!?!)

Steve setup is nice and something to shoot for.  Here's a way more expensive option, but really pretty and locking and stuff

Check out more info at pangaea-expeditions.com/africanoutback/index.html . The cost is too rich for my blood but I really like the idea especially for my defender.  Only thing stopping me from building one (besides getting the truck running) is having dogs that will get old and have one hell of a large jump in and out. 

That picture above has a slider on the right side for the fridge as well.

I have some boxes like Andy's, just not locking.  One for kitchen mainly and one for other camping stuff.  Tent and sleeping bags go in  compression sacks and in a drybag sometimes.  Clothes in another duffle.  Recovery gear in a smaller pelican and tools in a larger pelican.  Put tools under one of the bins makes it not that hard to get to when you need them.  Keep the recovery gear handy but tied down well.  2-3 water jugs that can go on the roof if you like or on the floors to keep the weight low.  Sometimes I have a problem with that concept....

I thought I'd dredge up an old thread.... Here is another Disco storage area.

The JEEP one folds in half. Yours could do the same then you'd have 8 feet. A simple telescoping design, like a ladder, would also work.

Edit:  Or just throw a pelican down there and let them use it as a step.