I found the info in the sticky that the chicks can go for 3 days without food and water. So it looks like I should have left my single hatchling in the incubator. Hopefully I didn't do any damage to the unhatched eggs. None of them have pipped yet. (At least as far as I can tell.) I thought one had a small hole, but upon closer inspection I realized it was a smear of something on the egg.
Still waiting....
Still waiting....