Wedding Etiquette: Should I Mention My Gluten Allergy?

I’m attending a wedding at a remote vineyard—gorgeous spot, but no restaurants or stores nearby. I have a gluten allergy, and the couple doesn’t know.

I don’t want to be a difficult guest with everything they’re managing, but I’m worried about having nothing safe to eat at a full-day event.

Is it okay to give them a heads-up or the planner? Or should I just pack my own snacks and stay quiet? Curious how others handle this.