Installed 3/4" rubber matting the load space and second row floor. Picked up the matting at tractor supply - sold in a 4' x 8' sheet for around $40. Very stout and heavy.
Used one of the kid's silver sharpie markers and an old carpenter's chalk line to lay out the measurements on the mats.
Sharp razor blades (needed several - and when I was too lazy to go back in the garage again for another one, used my knife - this in not recommended) and patience are key for an easy process. Helps to lift and maneuver the matting after the initial cut to effectively peel it back as you go. There were times I was thinking to myself that there has to be an easier way, but in the end, it turned out great. Very pleased with this thick, heavy matting.
Decided to cut out a couple holes for the second row seat belt brackets that are on the tub floor, instead of reinstalling the seat belt brackets on top of the matting. Did this for easier removal of the load space mat.
Has now been dog tested and approved.