IMO you should dine with your family. I would prepare my meals with them, sit down enjoy your mushies while they eat their meal. The lapband is your new way of life and you will always be eating differently from others, especially those who are not banded.
I had surgery last year, about 1 week before 4th of July. My brother and sister in law had a spectacular 4th of July Bash with all kinds of wonderful food, but of course I was on FULL liquid diet, being only 5 days post op. My family was and has been VERY supportive throughout my journey and on that day in particular they insisted I sit with them as a family and enjoy my liquid. I did and we celebrated our freedom as a family.
This year on the 4th and since my surgery, we eat all meals as a family when we are together, but I just eas ALOT less than everybody else.
Good luck on your journey and have a WONDERFUL vacation!