Khakis, at least mine, don't seem to mind one way or another. They will just lay an egg anywhere the mood suits them. My Blue Swedish however ruts out a nest in the bedding of their coop and lays her eggs there. I have 17 young Cayugas that will start laying in the next few weeks but don't know yet if they nest or not. Mine all seem to lay during the evening or early a.m. before they are let out for the day.
I wish mine will lay in the same spot everytime lol. I have a new layer that has laid an egg in the pool twice and 1 to 2 times out of the pool in plain site, but they are soft shelled. First one was a soft shell in a hard shell, next one was soft shell in a soft shell, and the other 2 were soft shelled