I do a lot of hauling logs. Been doing it since I was 14. I own an l4740 kubota now. A lot heavier then the 27 horse power Montana and other tractors I own but evan still moving logs on uneven ground is not to be taken lightly. I own a wallenstine logging winch and a walking beam suspension trailer. Pros of using a winch....can reach logs with the 200 feet of cable and winch them into the tractor so you do not have to back right to the log if it is in a bad spot. When dragging the log the log gets dirty so the mill guy will not like you much. In the case of firewood dirt is hard on the chain of the saw. Will hardly get 1 hour on a chain before having to resharpen. If the ground is high and dry so the logs do not get dirty and the distance to haul is less than 1700 feet i found the winch to be the best option. .
http://youtu.be/NXAxkAEGeH8.
With my 47 hp tractor I put about 1/3 cord in good going in a twitch. I pull them out tree length most times.
If the ground is muddy and or the yarding is father than 1700 feet then I hook my walking beam trailer to my logging winch. I winch 8 to 12 foot logs up on the trailer and head to the landing. I can haul 1/2 to 3/4 cord using the trailer. Logs arrive clean.
I may reposition logs with the fel but I do not drag them to far. It is hard on the loader and can tip you very quickly. One wheel down in a hole and dragging a 1500 pound log and your gone. When a tractor tips dragging backwards it gives little or no warning.
If you are dragging logs behind the tractor the tractor takes longer to rear up. Most times if you are going slow you have time to lower logs or stop before a tip
Lots of fun but take your time. You cannot possibly document all the things that can go wrong in the woods so learn from your mistakes, gain experience and knowledge of the does and don't
Watch for sticks and stumps that can go through your rad, tires and hydraulic hoses etc...
Cut stumps flush with the ground and flat across not on a sharp angle. Hard on tires.
Good luck and play safe.
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One other hint when using a tractor in the woods is watch the branches you run over. They can go through you rad or take hydraulic hoses.