I wrote a while back about my experiments with dehydrated vegetables. For me, they worked like a charm to fill me up as I traveled across the country for Thanksgiving with relatives. My airport food and airplane snacks were no problem for security as they were contained in small plastic bags and contained no liquids. I took a mix of vegetable chips (potato, carrot, zucchini, rutabaga, turnip, Jerusalem artichoke, and parsnip) and squash leather (like fruit leather). This nicely supplemented the box salads I could safely purchase to eat and I had plenty left over to add to the post Thanksgiving turkey soup. I felt full and content that I was able to fly with food that was not heavy, perishable, took up too much room, or likely to trigger any symptoms. I highly recommend it!
I hope you all had a safe and healthy holiday and can anticipate the next one coming up with as little stress and as much enjoyment as possible.