Okay, I have poured all over this truck accessories site, and the neatest thing I found was a basket that you attach to the trailer hitch of your truck. It holds up to 500 pounds, and folds up when you aren’t using it. I don’t have a truck or a trailer myself, so I don’t know if you can use it while you aren’t hauling anything, and I also don’t understand how you can possibly need it if you are driving a pick-up. Of course, I guess all spaces fill up eventually, huh?