I also tend to check my email 2-3x per day while I’m out for my own sanity and will respond to important* ones if not doing so would hold something big* up. Not using OOO avoids some of the self-righteous nonsense from people with nothing better to do than try to micromanage my personal time.
I’m mostly back in my actual office now, but I went with “away from my computer between X and Z” a couple of times and just straight up “I am on annual leave between X and Z” a couple of times.

I am annoyed when people send a “fergus ooo” outlook invite! Maybe that’s the (annoying imo) style for your team Fergus, but our nearest common ancestor is 3 or 4 people up, you’re not that important and I don’t care!
I personally like it. Of course, the emails that I’ve seen still say what to do if the matter is urgent and needs to be handled now — but as a person who gets 100+ emails a day, whether I tell you I’m deleting all of them when I get back or not — if it is in the thousands of emails that might accumulate in the time I am off, I’m not going to see it or respond. Better that I tell you now that you are going to have to resend the email after I return (or get my backup to handle it now) than you sit around waiting for a response that is never going to come. It is actually pretty common in my industry for any absence two weeks or more.