I would pack my goodies in 12x12 hard containers. I like my Art Bin ones, as they are slim. I have several.
I would bring lots of cardstock, some pp, and photos. I would also bring tons of adhesive. Running about would be awful! I would also bring eyelets (and a setter and a pick), brads and staples.....anything to help hold stuff together. I once had to bring stuff in limited quantities, and I stuffed random ribbons, buttons, flowers, etc., into a ziploc baggy.