Maybe I'm missing somthing but you could just lay the seats down. Removing the rear seats in the wagon doesn't give you any more length in the cargo area. I would give you about 6" deeper cargo area where the rear seats are but no extra length.

The seats are easy to remove. There are four bolts that hold them in and then they just pivot out. But, I don't recommend doing it that often since I don't know how the housing for the bolts in the seat backs are constructed and you might end up stripping the housing out.

When I installed my leather seats, I found that one of the bolts used to mount the seat had a defect in the threads and it messed up the threads in the housing. I ended up having to use a tap to re-thread the hole. Luckily for me the bolts are the same size as the flywheel bolts for my 914 so I just used one of them as a replacement.

 

y would u be sleepin in ur car?

 

I don't think the back of the seat is solid and it might be a little lumpy. The seats lay fairly flush with the rear cargo area and when the seats are laid down, they go most of the way to the front seats. The is a bump on the top of the rear seats but that might work as a pillow. I'll measure the length tonight.

If you are worried about it being lumpy, pick up a camping/backpacking air mat. They are fairly compact (about the size of a 1# coffee can) rolled up and work very well.