Thanks for all your help. I know I can make good food choices when I am ordering myself. This is a high school group trip and many of the meals are provided. I have no problem not eating something if it doesn't fit my diet so the protien bars will be a good substitute in that situation. I also see the dietian before I go and can ask her opinion.
TH, did you have any problems with your band during the flight? I have made a couple of short airline trips and no problem. My PA said that the band could constrict during long flights. That sounds like fun....huh?