O posted on DIY board, but didn't like the responses so hoping you all can help!
Our reception is in an old horse barn, and I'm doing a lot of rustic/vintage stuff. I saw this pic, and wanted to do this for our escort "cards" with name on front and table on back:

So I made these:

Here's where you come in.. I already have all of the tags on, and a lot of names done, but now we decided (because of the timing of everything) to do open seating (except for parents and grandparents). I also already wrote our names and date on the back of all of the actual keys. This was going to double as a favor, along with photobooth photos.
Should I just put a cute saying on the back of the tag letting people know it's open seating? Put a sign on the table that lets people know it's open seating, and put something different on the back of the tag? Other ideas you may have??!