another option is the seat extender. It's typically used to give more leg room to taller people (making the seat go back farther) but I believe it can also be used to make the seat go farther...

did you even bother sending Rontele a private message?

FWIW I lived in my subaru for two months with two dogs. I don't see why a tent is necessary. I am in the middle of a month of living in my...