If this is land that you intend on hunting for many years, the best way may not be the cheapest. If you hire a good dozier operator and something like a 650 John Deere you should be able to install 3 nice plots in a day, so for about $500, depending on what needs to be cleared. He can fix you a good road at the same time.
Trying to hand clear a sizeable area is going to be a very difficult task. I had rather have two or three good plots than several small hard to work plots. The areas that are inaccessible I would leave off. If you can't get equipment to them or get to them to hunt why bother.