We've actually been on 48 hour hosting for the past 10 turns but it hasn't been noticeable since we've still kept up a 24 hour pace.
If your friend isn't on the forums please send me their email address. If you want, I can keep an eye on the server and if I don't see your turn I'll assume you don't have Internet access and switch it to their email. However, if they don't submit a turn how would you like to proceed? We can pause the game or slow it down so you only have a couple of stales or look for a short term sub.
Enjoy your vacation!