I always wear a Filson vest, so my EDC includes all my pockets, shirt, pants, belt, and the vest.  I posted up my EDC stuff a long while back.  I have revised this to be a bit less stuff, but for the most part it is still generally accurate. (note I carry fewer knives now, and have slimmed down the shoulder bag to mostly a Ham radio, batteries and shelter).
The Filson vest has 7 pockets including a full width double back pocket.  I keep my Tacoma Mt Rescue tube tent and paracord back there along with a boiled wool helmet shaped hat and in the winter wool gloves.  Mine is a custom made Style 8 in wool, and I also have the tin cloth version for hot days.  Here is my actual vest with several years on it.  I needs a bit of repair around the hard tools carried in the left upper pockets.

Take a look at the tin cloth version and see the back pocket here:
http://www.filson.com/8.HTMI do not routinely carry a PSK box on my body, but have distributed many items around my person.  I find this easier to do.  I also keep grab and go kits in the car, at my desk, and carry a shoulder bag as my Ham radio station.
Here is my old post.  Long, badly formated and slightly out-of-date, but you get the idea.
http://www.equipped.org/ubbthreads/showt...=4813&S