I've seen a good sized rock used instead of a golf ball but plastic coated cable seems to work best as it cinches tightly around whatever you use and it coils into an easy to store size. Ideally you use a winch for fine control of the pull but someone slowing driving off will work. Definately skinning all game while warm is the best way to go. As a kid I remember skinning rabbits before walking to the next shot was always easier than skinning after getting back home a few hours later.