I have a light-duty folding hand cart that folds very small and flat, runs well over pavement and reasonably well on gravel, and is rated for 150lbs. In addition to regular hand-truck duties I combine it with a milk crate and some bungee cords to make my redneck three-gun cart. It's cheap, small and light enough to stash in your trunk if you needed to switch from driving to shank's mare.