While you shouldn’t use a vacation message like the first example in this article, it doesn’t mean you can’t have a little bit of fun with your emails.
I’ll be back in front of my computer on [date] and will respond to your message then. If you require immediate assistance, please feel free to send an email to [Contact Name] at [contact email] so that they can help you out.

I used to work with someone who had a message telling people she only checked her email twice a day. You pretty much needed to call her if you needed anything outside of those times. (She worked in a remote office.) I think she had read one of those books on efficiency that recommended scheduled email time. But there were problems with this: 4. My department often had to email attachments or text to illustrate our questions/concerns. And we were on deadlines. Reading a page of text over the phone was not an efficient use of anyone’s time 5. She did outreach & was often out of the office on site visits, trainings, or travel to these places, but never ever set her OOO for these, because she was “working.” However, she was effectively not available to read emails from other staff until after hours on those days.
My workplace is super strict about out of office replies. We have 3 scripts we are allowed to use; and we are only allowed to change our name, job title, and return to office date. If you veer off script, management will have IT turn off your out of office as it does not comply with their standards. They are also super strict with messages on our voicemails, again with the option of using 2 scripts and changing your name, job title, and return to office date.