I would suggest calling your hostess and offering to bring a dish that you could eat from primarily. This is what I do, because I have a picnic food phobia (stop laughing! I really do! ) - I always bring a salad to a cookout so I know I'll have something to eat. Also, eat a good low carb meal ahead of time to ward off temptation. You might be surprised that your host serves something that works in fine wiht this WOE... but plan your day to have higher numbers, drink plenty of water and then get right back on track.