Exciting!! Good luck!! You can put them in at any point. I usually do mine in the evening so that I can see better when I candle and mark the air cells for lock down. Make sure that you take the egg turner out and lay them on the grate, (unless you are using egg cartons to hatch in.) I fill the water wells and add a couple wet sponges (on the grate/mesh, not under it) for humidity. If I need to bring my humidity back up I pull out a sponge, wet it and stick it back in. You can open the bator if you need to, especially to keep your humidity up. Not opening the bator is a precaution, and it will keep your humidity up longer if you are not opening it. However if you need to, it is NOT the end of the world.
