If you did it legally fine (Having the proper tests and documentation to meet the regulations of your destination state and all states being traveled through = legally.). If you did it illegally, I would not brag about it in a public forum.I traveled with a small flox
I traveled with a small.flock of 4.
I moved west to east with small flock of 4. Only thing i would be concerned about closed trailer is overheating within the confined space. I did 2 to a dog crate, used pee pads changed in morning, at night before bed and as needed through out day. I would lay new over old and take out all with the final change at night. Of course fresh water through out day and feed in evening. Travled in my car and night would keep windows down for fresh air. Was somewhat stressful and they stopped laying upon arrival to new home for short while till they adjusted. But did not lose a bird nor have any sick ones. I am not sure about ducks.