They don’t like trying to dig into wire or wood. Many ducks, particularly Muscovies and breeds that like to set, will no sooner deposit their precious eggs in the open than most humans will take a shower naked in the middle of a street....
putting them all in Super Incubators, and walking until the 9th one hatches. If get 2KM eggs, that won't take long. 7KM and 10KM, obviously, will take longer. So will using standard Incubators or only walking one at a time. You'll need to decide if time is more ...