I did overnights Friday, Saturday, and Sunday, so I am still awake. So, I went down to check the baby duckehs. I brought my phone down for light. I don't know why I never thought of this before - it turns out that my flashlight app is perfect for candling eggs. It's a small-diameter, easily handled, cool light source, and works like a charm.
All but three Khaki Campbell eggs were clear - the drake hasn't hit his stride, which is fine, as he's only 5 1/2 months old. They could be crossbreeds with Rouen daddies, actually. I also have a few more Rouens on the way. I'll be putting up notices at Agway and TSC soon enough! I need to do that with a few turkeys, actually.