I haven't met a type of wood that isn't good for burning in a woodstove. Some are better, sure, but none are no good. The only trick is the pine will shorten the creosote cleaning interval for the chimney.
I have huge piles of slash from my clearing operation. My dozer can push over similar sized trees. The piles should be pretty free of dirt nomatter what you want to do with it.
If you can burn, do it. That is the cheapest option. Do it safely and legally. The larger and drier the pile, the faster and cleaner it will burn. I would stack the piles as big as you are comfortable with burning right now and let them dry out until wet weather. Many loggers will even put a big sheet of plastic on the top of the pile to keep the core dry when the rains come. The piles will shrink as they wait.
The next option is to cut out the good wood and have a huge pile remaining. This won't get you much unless your time has little value and firewood is of great value to you. In the end you will still have lots of slash to deal with. The slash will need to be dealt with.
There are large tub grinder trailers that can come out and make you a mountain of ground wood. That is cool but expensive get an estimate. A clean pile is much preferred since the grinder will last longer.
The last option is to have a guy come out and haul it off to a central grinder operation. Out here that is about 300$ per semi trailer but it is highly dependent on the distance they need to travel.
There is one member on this board who dug a long deep trench and buried the whole pile. Might not be legal in your area but it sure was a safe and cheap way to go. Don't plan on building anything in that area.
An amazingly huge pile of slash is made when a pretty small area is cleared. You could just make a huge pile out of the way and leave it sit forever. Small animals and birds are supposed to like them.
I am having the logger restack my piles into one huge one and burn them. Stumps, logs, and slash will disappear in short time with a 20+ foot tall slash pile. The risk of wildfire is too high to do it myself, he has insurance.