Mine started laying mid-March last year (their first year) but didn't get serious about setting until the end of April. Until then, they would lay eggs *everywhere*...it was like an easter egg hunt in the coop. They finally settled on a feed bag full of straw, they'd jump up and under the flap to get into the bag. Not ideal, but hey - if that's what they wanted, I wasn't going to argue.
This year they started laying 2 weeks ago, I've let them hoard 9 eggs so far. Even the drake takes turns setting on the nest to keep the eggs from freezing.
I knew they were going to start laying when they started to build a nest in the corner. This year they aren't nearly as modest, but I also took the chickens out of their pen so they probably feel more comfortable.
They do mate out of water BTW, all ducks do.
Call ducks are the sweetest things IMO. I always wanted some as a kid and finally got some as an adult. They just make me go "awwwwww!" every morning.