That little S10 works great.
Not to sidetrack your thread, but I wanted to put this out there for other readers who may be backyard do it your selfers that are tired of shoveling dirt, gravel, and mulch out of the beds of thier trucks. Back when I had more free time, I used to do a lot of small concrete and landscaping jobs on the side. I have a little 30hp John Deere with a front end loader that is as handy as a swiss army knife, but I always wasted a lot of time shoveling product out of the bed of the truck, so I bought one of these
http://www.loadhandler.com/ for use in my 3/4 ton chevy and I love it. It does require a bit more work than your ingenious setup, but for me and the small landscaping projects I take on it works great. I think Harbor Freight even has a version, but I can't vouch for the quality of theirs.