I pack mine out on a pack frame.

just use your map or gps to find the nearest road or the downhill road from your kill, take it there. get the atv to the road or your truck to the road. then, repeat as necessary until you get all the meat out.

it definitely sucks packing them out when it would be soo convenient to drive an atv back in and drap it out or load the atv, but just remember....if you can do it, everyone can do it. what separates the road hunters and those who get deep back in the woods is exactly that; easiness.
you will also find a good correlation between the success rate of those that go back in, and those guys that drive around all day.