That's the thing -- whenever I get the invitation and finally take delivery... My daughter will be 6, my son probably 3. It will be be boring for them for most of it, except for actually getting in the car and driving off. I'd love to have a family photo, but I also have to deal with getting the LATCH car seats installed, which can take some time...
My current car is a 2004 Acura MDX and my wife has a 2010 Prius, so we didn't bother trying to find out if there is anything to protect the seats from the car seats. I know they can get pinched and leave markings since the seats are cinched down so tightly. So definitely want some kind of padding.