We use it in German pancakes. Beans cooked in duck oil are good. Bread can be made with oil. Eggs can be fried in oil. Basically, if you use vegetable oil or butter in something, you can probably use duck fat. Though I probably wouldn't use it for anything sweet.
It's been a while, and I've only processed nine ducks total within the past four years, but:
Flipping the meat isn't that bad. It's not like turkey; you're not cooking it for six hours at a time, and it shouldn't weigh twenty-some pounds. Cook for an hour, flip, cook for an hour more (depending...