I usually incubate Muscovy along with chickens.... Annoying, but doable.
Do you dry hatch?
Not really, I put in water at the last possible minute, about internal pip, and then pull them out as soon as I can since the chicks make a crazy amount of humidity.
It results in the humidity in the incubator shooting up for two to three days, then I take all wet and moist things out so the humidity can drop again.