I always feel so panicked at knowing I need to quickly maneuver my belongings and myself when boarding public transportation, from the schoolbus when I was a kid to the airplanes in university. When I travel now, I insist on the smallest bags, and as many travel sized amenities I can find in hopes of allaying some of this panic. I also never wear things that I know security will ask me to remove, like belt, heavy shoes, metal watches. Travelling with my cat is usually stressful enough, especially since my stress also stresses her out! I feel panicky just reading your post, but I still love the destinations--once I have all my belongings and necessities under control.