When my neice got married she wanted me to make her a signature quilt. But she asked me about 3 weeks before the wedding. So what I did was cut out squares so people could write on them. I used the blue painters tape on the sides and ends to make sure that they wrote in the correct place. I then made the blocks. You can also iron butchers paper on the back for the fabric to make it easier to write on. If you decide to do that iron the paper on first then cut the squares.
Hope this helps.
Congratulations on the wedding.