All my friends love to eat...I go along but I eat what & the amount I'm comfortable eating & that's what you can do also.....they won't even be paying attention to you I wouldn't think.....they will be thinking about the vacation & enjoying themselves....which is exactly what you need to be doing also......I'm sure it won't turn out to be the worry you are anticipating it to be.
If you are like me.....I always anticipate things to be worse than they really end up being