This is an interesting place and I'm enjoying the ideas. After reading several I have to say, "Man, you guys are good!" It seems that every time I think of a relatively plausable idea it's already been done. *sigh*

I had this great idea for an SUV reducer (the things are just too big!) rather like Dr. Who's Tardis... its little on the outside, but big on the inside. So that way they are a decent size on the road, but you can still stuff them with stuff when you go camping.