Terrielacy is exactly right (of course she is, she knows ducks, LOL!). My ducks know now when I tell them, that they are about to be put in the coop. That makes it much easier. But I do it just as she says ... I walk slowly around behind them, and they move slowly away. I do have a long pcv pole (it's easy to see at night) and if they break formation, I hold the pole out like a long arm on that side, and they will turn the other way. It's much easier to WALK them in ... they still hustle and run a bit. But if ever you chase them, they panic and run, and you have a mad scramble.
BTW, mine were pretty friendly as babies, at least compared to how they are now. They will come to me, either to keep an eye on me or for food, and I can easily pick two of them up if they don't suspect I'm about to. But they don't really like to be touched and are not affectionate at all.
One great thing that helps me SO much ... I have trained my chickens to come when I call "chick chick" (high pitched chicky-call voice) and my ducks to come when I call "duck duck" (low pitched quiet quacky sound) so I can actually sort the two out and get them where I want them. I did this by feeding them
I feed treats to chickens and ducks in separate places, and call them separately, so it worked well. It took months, but they are very reliable to almost always come where and when I call.
Now I'm trying to get the baby gooses to come when I call "goose-goose" ... they did when they were very young, but now they get distracted by grass to eat along the way sometimes ...
trish