No you can still move the egg when you get back. It's not the time but what you do to the egg that matters (ie not turning it after it starts to develop). Freshly laid eggs can be turned any which way you want as the embryo hasn't started to develop yet.
You can mark the upper most part of the egg with a dull pencil and that will make sure that you know which side is up, just on the oof chance it gets rolled a bit.
Make sure Mom sprays the area once a day until you get back, this will help with humidity.
Danny
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