I dry hatch- it doesn't necessarily mean no water, but it can in a humid area like Oklahoma. I fill the water well about once a week, it runs dry about day 4-5. I make sure the night before the hatch is supposed to start that it is full again and I add a "wick" to increase the surface area for the duration of the hatch. In the winter I don't dry hatch though, I keep the wells dry but no wicks until lockdown. My wicks are cut sections of pads meant for a humidifier, caught them on a great clearance at Lowe's once. They are approx 5"x7" and sit on end so they stick up out of the water tray in my cabinet incubator. The wick up the water and increase the humidity by increasing the surface area of wetness.
Going by my multi weather thingy, I'm running about 20-30 percent humidity during the incubation and 45-55 humidity during the hatch. That is WAY lower than recommended for standard hatching but it works GREAT for me with chicken eggs. It did not work with duck eggs though. I think they need higher humidity overall.
Shavings are great. Sometimes I use shavings, sometimes straw, a few of my coops have carpet scraps or pieces of those rubbery kid's floor pads.
I've hatched duck eggs, and they need lots more humidity, misting, etc. It was fun.
