Gluten Free Picnic in Gluten-Free Foods, Products, Shopping & Medications Posted June 13, 2013 · Report to Admin Invite them, just make it perfectly clear that they are NOT to bring anything. Assuming of course you are okay with providing food for that many. I do this at my house, and people are always asking what to bring and I know lots of people after being told nothing bring something anyway. Just make it clear that they are truly to bring nothing, and if they do just hide it in the fridge somewhere or something and then explain later why it isn't out. You don't want them not to come because you told them on the phone it is a gluten free picnic... I think I will try that, my family just isn't very supportive of my diet ( mostly the vegan part) and I just wanna have a good time. Maybe I can compromise and have meat available.