Hoo boy, have I got some PTSD from Old Job about out of office autoreplies. Exboss was such a stickler for them and actually enforced her expectations as official policy. Meaning if you didn’t do it to her exact specs, she’d call you back to the office to do it (which no one did) and read you the riot act afterwards while threatening to write you up for insubordination. She demanded them any time that we were away from our desk for longer than 30 minutes and for anything other than a meeting. So training in the conference room down the hall, a work lunch with teammates, leaving an hour early for an appointment, arriving late for an appointment, even working from home, all required OOO alerts.
Doesn’t work when phone is off or out of range, does it? I’m a small business owner but I am often driving in out of range areas and will be traveling for a week with no signal most of the time. Considering leaving my phone plugged in at home just so it can send the auto replies. Still no fix though for the hours spent outside sms land every week.

“No matter what your best intentions, you're going to get bogged down the minute you return to the office,” Sullivan says. “Don't set exact timeframes for responding to messages in your OOO. Instead, set general expectations for‘I'll respond as quickly as possible upon my return,’ giving you some leeway.”
While the sender waits for your response to their email, take the sting out of your absence by involving them in a holiday survey, like the one below.