Hello out there. I am a potter that has a new line of wall tile hangings and now I need hard walls for the first time and am heading in the propanel direction. Any one able to fit the 7' ones into a minivan? I have been surviving with a station wagon, but this is the last straw(ain't no more gonna fit!) and have been looking at used vans. Also, any disadvantage to the Knock Down panels?? How do you attach your panels to your tent?? Thanks for the advice!