Mobile duck schooner...?!

[Miss_Lavransdatter]

Hi all! I'm asking a question for a friend. He has a flock of Welsh Harlequin ducks that currently free range, but he'd like to start breeding them using a clan mating system. Obviously, this would require keeping them locked up during breeding season. He uses large hoop schooners for his chickens and turkeys and likes that model, so we're trying to figure out if it's feasible for the ducks too. They are sturdy frames with wire mesh and no floors. The walls are covered by tarps but there's not a separate enclosed shelter inside. It is both coop and run. As a side note, he also has guard dogs and predators aren't a big issue here.

The clans would be about 1 drake and 5 ducks each.

First off, what kind of square footage would the ducks need in a situation where house and run are one and the same? They would be moved to fresh pasture regularly. The current schooners are 288 square feet but can be divided in half. Is 144 square feet sufficient for 6 ducks? Could they go smaller?

Secondly, how could their water needs be met in an entirely mobile coop? The chickens and turkeys use hanging waterers but I don't think the ducks could dip their whole heads in those. Would separate buckets/tubs of water just have to be removed and returned each time the schooners are moved?

Thanks in advance for any insight! And if anyone's done something like this before, let me know how it went.