I removed the entire rear seat as one piece. I believe there are 4 bolts at the very bottom once you fold up the seat bottoms, then simply lift upwards then forwards.
I do plan on removing the insulation on the rear wall one day. I'll have the interior line-xd in flat black as the carpets were pretty stained when I purchased the truck and it should make cleaning easier.
Just a quick update, I have purchased most of the parts to install a Puma 12v air compressor under the bed along with its 1.5 gallon tank. Over the past week I've wired the switches in the center console for the compressor, rear locker, front/driving lights, and some bed lights. I grabbed some switches from
http://otrattw.com and they look great. In the next order from McMaster all of the wiring and air hose fittings will come so that I can finish installing these parts. At the same time I will run air hose to the front and rear bumpers for air tool use, run wire to a 12v outlet at the rear bumper, and wire to the LED strip in my UWS toolbox. Unfortunately I still can't find a place nearby to bend the tubes for my "can back."