I never used a cart, but I do use a body bag I have from when I worked for the Medical examiners office. Contains all the blood so no one can find your spot and keeps the truck clean as well.And in hot weather a chunk of dry ice and it doubles as a fridge. They roll up nice and small and weigh next to nothing. O and they slide over small rocks and bushes,and makes dragging out a breeze. Just go to your local coroner and ask for one, or any military surplus online store should have them(they may be material)
and in Jersey its common to see a man stuffing a body bag in his trunk on a dim lit road, so no worries here...LOL