My "gang" and I have been hunting Sandhills for years. There is something to be said about shooting a four ft tall bird. As for the meat, just breast them out. They do have large legs but they are like eating electrical wire. It`s not really worth the time or effort to pluck them.
To cook them, just use any goose/duck recipe, although the breasts are rather large. Low and slow(12 to 16 hrs is good) is the best way in a slowcooker. They also make great jerky. This is the way my freinds and I do them up. Good eating.
Ron