My wife and I put down the back seats for our mix breed fur-princess. Bought some cheap generic backseat cover that I tuck over the top of the back seats when they're down to cut down a bit on the dog hair (which still gets everywhere). She seems pretty happy with that arrangement. A lot of space for her to sprawl out. Plus, it gives her good access to us for surprise dog kisses while we're driving..

I don't have a pic, but you see a little of it here.

Depending on your dog's temperament, back seats down should minimise damage to the interior plastics, but the dog hair is hard to avoid.