Just messing around, I trimmed a carpet remnant for the back of my Telluride, for when second and third row seats are stowed. Plenty of room to lay flat for sleeping (I’m 6’ even). I car camp a lot. I found a piece of pre-sanded wood to use to bridge the gap between the second row captains chairs. I may add velcro, if needed, to secure things in place. This is all just proof-of-concept. This is easy to simply roll up and remove should you want your seats back in place.