After you are sure that everything connected properly, find a large empty parking lot and do a little practicing. Bring a couple of folding chairs and try to back up between them. Place the chairs and see how close you can back up to them without hitting them. Place them like fuel pumps and try driving up to them as if coming into a gas station from the street. Do the same thing pretending that the chairs are a dump station. Practice makes perfect and folding chairs are a lot more forgiving than trees, gas pumps or posts.