I know I'm being unreasonable, but I'll say it anyway -
Instead of putting a little box on the RSPV for guests to write in their "dietary requirements" I would have just written "please email [email protected] if you have any dietary requirements".
I feel this would have eliminated "trendy" dietary wants, rather than needs. Suddenly all my female secondary school friends who would eat an entire loaf of bread in the form room over one break time are now "gluten free".
I accept gluten intolerance is a thing (obviously) and can develop over time, but I suspect a lot of the special meals that we prepared were for people who did not necessarily fall into that category. Perhaps if they'd had to contact me by email, the ones who have made it a dietary choice would have thought about it a bit more.
We ended up paying for for 16 (out of the 45) meals to be gluten free (a small excess for "special" foods) and saw at least half of those folk having a nibble on the normal bread rolls that were presumably much tastier than the gluten-free alternative we had offered!
Of course given this is a tiny gripe and I'm aware how lucky I am to only have that one thing pop to my mind when asked what I would change - loved our day and obviously this didn't spoil it... Was just a lesson learned that I would pass on to a prospective bride, especially one on a budget as we were.