I did it several years ago in a cheap old still air Styrofoam incubator. It was my first attempt, but I had over 90% hatch rate of both chickens and ducks. It was a pretty low tech hatch, I just went by feel, so I can't tell you much about the humidity and temp. I believe I did mist the eggs some. I started the ducks first and then added the chickens one week later. I had a long hatch 24-36 hours between first and last, but other than that, very smooth.
One big mistake though, I brooded them all together. That went fine, but when they were all big enough to release into the flock, I lost most of the chicks because they followed their duckling "brothers" into the pool and drowned. Very sad.