They would be ok for a while. Some people keep them together in the egg box until after their first sheds. As for living in the incubator, I house my hatchlings in individual containers in the incubator until they have begun feeding. So they are fine at "incubator conditions" for a while.
How long will you be gone though? I would say anything under a week would be ok… but the shorter the better.
Incubation time isn't really determined by the parents. It's the result of temperature. If you've incubated at a higher temp, they will hatch sooner. If you've incubated at a lower temp, it will take longer.