Half of the auto-replies I get are for very specific chunks of time. Like, if you are out of the office for three hours I don’t need to know, dude.
Thanks for getting in touch. I am currently out of the office from [date] to [date] and will have limited access to my email during this time. You may be able to get ahold of me on my cell phone at [phone number]. If you can’t get through to me and have an urgent inquiry, you can contact a member of the team at [phone number], or my assistant [Name] at [email] or [phone number].

When I tweeted this, some people argued that the pollster above was using his wife as an excuse. This might be true (and, if so, is probably a bad defense mechanism from some of the work culture habits described earlier). Another possible explanation is that the pollster is telling the truth — his inability to try and balance a vacation with some light work time built in is understandably frustrating and exhausting to those around him.
I might sound nitpicky but the language is important. “Might” or “may be” or “slower than usual” are vague and don’t offer the sender all that much information about when you’re really going to respond to them. Worse, they do a horrible job of protecting the time of the email receiver who, as the responder notes, is not in the office! Such a responder implies that, not only will the vacationer reply to the email, but they may not even miss a beat. They may be slow to respond, but they also might not.