I pluck the feathers away from the area in front of the vent, then make a 4-5" cut. Reach in and get everything out. I then take it home and fill my utility sink with the hottest water that will come from the tap, and submerge him in it for several minutes. Then drain the water and most of the feathers will pull out easier. The wings are harder to pluck, sometimes it seems easier to torque on them at 90 degrees from the way they come out of the skin, it seems to split the skin along those big quills and you can pull them right out.

Also, it seems like if you take the smaller feathers off of the wing first, the flight feathers come out easier?

Cut the head and feet off of the bird. Make sure you take the crop out of the breast area too. Some people do that in the field but I' d rather not put any more cuts into the bird than I have to before I pluck it, it seems like turkey meat is a magnet for the tiniest feathers that are next to impossible to get off.