I will be getting married in April and recently sent out invitations. The rsvp's are starting to arrive. On one rsvp, someone wrote that they need gluten free food and wanted to know their options. I'm at a loss. We have already paid the caterer and settled on basicaly food we thought everyone would enjoy. We are already spending a several thousands of dollars on the food and can't really afford to provide 250+ people with options. I read on an etiquette site that it's not our responsibility to do so. I do sympathize with their needs but I can't afford it. Not sure what to do or how to approach it. Any ideas or suggestions?