I'm mostly finished with the trunk mods. I never could find a 12v power wire going to the trunk, one that was hot all the time. I found one heavy wire that had 12V with the ign. on, but didn't want to use it. So I ran a 14ga wire along the edge of the trunk, under the carpet up front, then under the center consul, and spliced it into the power wire to the front lighter socket. Works ok....that wire will handle more current than the socket, so it should be fine. I'll never use the front socket while the rear sockets are in use.
Then I rigged up a utility mat that covers the rear seating area. It attaches to the rear of the back seats using bungee cords. I mostly carry stuff in the rear seat area.....the mat will protect everything.