Weddingbee boards

I am making my own escort cards - I have small pieces of wood that were cut from a tree and I am making ornaments out of them.  On one side of the wood I am writing the guest's name, and on the other side will be the table where they are sitting.

Here's the tricky part.  Instead of using table numbers, I want to put a picture - the picture will also have a corresponding picture on the table so that people can find their table.  For example: a guest will be at the maple leaf table - and on the back of their escort card will be a picture of a maple leaf.  Then, at the maple leaf table there will be a large block of wood with the same picture of the maple leaf. 

I feel like since most people are used to seeing table numbers on their escort cards, they may be thrown off a little by the use of a picture rather than a word or a number.  So I was thinking of maybe writing an explanation of what they're seeing and how to find their table.  Does that seem like a good idea?  Does anyone have an idea for what kind of wording to use?  Or am I not giving my guests enough credit and they can figure it out on their own?