We have kept ducks on and off for years.  They are a lot of fun,  however clipping their wings to make them stay home will probably not help much.  Most of the domestic ducks are heavy enough that they don't fly much, a long runway and not very graceful landings.  If you do clip wings one wing  is enough as that puts them off balance.    We have a small creek running past the house where they like to dibble, down below the hay fields it meets the river.  We have never had ducks go all the way to the river though in the Spring when the nesting urge hits they do hide out on the creek in the brush.  The real problem with ducks providing you train them to come to be fed (at least in the evening so you can close them up for the night) is that almost everything preys on them and they are defenceless.  In our area they are vunerable to foxes, coyotes, hawks and great horned owls.  The Pekin ducks are great egg layers as good as the chickens but they are messy so you need a good sized area.  Hope this helps

Given where you live, your plan of keeping the ducks close to home until they are used to you and the area, and in the habit of being fed and shut up in the evening is about the best you can do.  I hope you do well come Spring.  We have just four Pekin ducks  at the moment that I got this past Spring along with chickens and guineas.  They are the oddest  ducks we have ever had, as so far they appear terrified of the creek and insist on washing in a half barrel (on its side) and drinking from buckets with the other birds.  We usually start our birds in the greenhouse under a brooder,  then gradually get them used to the outside.  There is a downside to this arrangement.  We have about an acre or so that is garden surrounded by stock fence,  this works well until the birds are ready to go to the barn or chicken house,  then for some weeks we can't go outside without a line of heads peeping through the fence wanting back in, and in the case of the guineas yelling about it.

I would love to have a few ducks too! I have lots of land underwater until about June, but nothing in the summertime. It all dries up. I am considering putting in a mud pond, though. I have a low area that's perfect for it and a high water table. I know it would be always full of water. There is a little pond there until June, as I said above, but it dries up then. If I dig it deeper, I may have water all year. I haven't done it yet because its costly. I have considered hand digging it, but that's just way too much for me to think about right now. If I could put the money together, I might hire someone with a big digger to come and dig the pond for me.

I might also put in a little one hear the chicken house where they can stay all the time. I am considering fencing in a large area there for the chickens to sort of free range. The fence is more to keep the chickens in than to keep predators out. They have a very large fenced and covered secure run now but I like to let them out to wander in good weather. They wander all over the place, that's the problem. They head down the driveway and into the garden.

I would love to keep a few ducks with them and put a small pond in the fenced area. This would also guarantee that the chickens always have water to drink too. I would need something that would not fly away.

I don't know about the flying away instinct. If there is open water here, there are mallard ducks and Canada geese in it all year long. There's not many places with open water, however. We see it on the big lakes. We live near one.