Duck and geese care ?

We have always had ducks and geese at our house. We dont have a pond but we have a swimming pool and other water areas. We have two ducks at the moment and they have just started laying eggs. they lay one a day from now until summer. We have barns and such but they will lay their eggs everywhere, sometimes in the middle of the yard, sometimes in the nest, just never know. When we had about 10-15, they would usually lay them in a nest they made up against the barn. So have a coop or something that they could be next too would be a must. Do you know that they poop everywhere and sometimes it is more than I can take when we have too many. just an fyi. enjoy