Can you be a Fisheries Observer with a special diet?

I am considering a job working as a fisheries observer and I've seen other posts here about being an observer so I thought it would be a good place to ask. I know meals are usually provided on the boats, but I have Celiac Disease and cannot eat anything with gluten or from a kitchen that uses gluten. I was wondering if it would be conceivable to bring my own food on trips or if that just isn't possible. I would be working with a program where trips are only 1-5 days, so it wouldn't be a lot of food.

If anyone with experience as an observer could tell me what to expect in terms of kitchen areas on boats, I would appreciate it. For example, would a microwave/fridge/freezer be available, do people ever bring their own food/snacks, what does eating normally look like on the vessels, etc.