While you certainly don’t want to go on and on in your message, there is an opportunity to engage or educate while you’re away. Here are a few options to potentially include.
In conclusion, an eager customer trying his or her best to reach out to you is the last person you want to disappoint. Make their day special with an unexpected or quirky autoresponder email that your customers wouldn’t have thought they’d see in their inbox in a million years.

“Thank you for your email. I am currently out of the office and will have no access to email. I will respond to your emails when I return on [date], but it may take me one to two days to sift through the messages. I appreciate your patience while I’m out. If you require immediate attention, please contact [name].”
My mom works part time at a library in archives, where her personal work email is also the general archives email (ie LibraryNameArchives @ email . com). She has an out of office response that replies with her work hours (since she’s the only employee in the archives) so people know when she’s in the library and can respond or when they can come in and visit her. The only frustrating thing is that her email either isn’t capable of, or she doesn’t know how to, turn off the OOO email when she’s actually in the office, or doesn’t trust that she’ll remember to turn it back on. She’ll send me an email about something, I’ll respond, I’ll get an OOO response, she’ll respond, I’ll reply, I get an OOO reply, etc etc.