How far really doesn't matter. I got eggs sent to Maine from Washington state in 2 days, from Pennsylvania 5 days, the ones from Washington did better. I have hatched over 100 chicks from shipped eggs since May, and have done both the overnight and the 6-8 hour thing, there are so many different variables with shipping I don't think the "extra" hours sitting really help or change anything. Besides, waiting overnight just puts your hatch a day later
You want them not to be cool when they go in the bator so there isn't going to be condensation on your eggs. I just let them come up to at least room temp and even sit them on top of the bator while it's warming up or humming along. I've never let any sit very long, maybe 5 hours.