Duck relationship goals.I take my ducks for walks, but not with collars and leashes. We have 5 acres and we go on, "foraging walks," where I supervise them and they search for bugs and eat grass and dandelion leaves.
My ducks live for walks, and I take them most days. They stand at their aviary door quacking loudly for me, and burst out when I open it. We stick together, they follow me and I follow them. When someone gets distracted and wanders a little too far I call them back, and reward them with mealworms. When it is time to go home they follow me in an adorable line.
They key is having a reliable recall. That way you can keep them near you, and get them back in their run or aviary when you are ready to go back home. The way to teach that is pretty easy. Don't be scary. Give them delicious treats and say a unique noise while they are eating it. Do that for a few weeks. Then show them delicious treats and say the same unique noise the moment they start moving to you. Eventually you'll be able to get them to follow you just with the unique noise. I always try to give a reward after they recall to keep them motivated.
Think more dog park walk with attentive owner than a city leash walk.