I agree they will be fine untill you get home. For me this a plus as if I'm there I get nothing done as I'm glued to the incubator watching them!! When really I should be getting on with chores!! My chicks stay in the incubator for 24 hours after they hatch and they are fine. The only time I open is when hatch is complete or the incubator is cram packed with hatched chicks. I like to let nature take its course and not interfere with them.
Wishing you the very best of luck, I hope you have a great hatch