We are booked for January 19th to Antarctica with pretrip. I normally take a carry on that I really carry, however since we will be lugging large jackets I would like to take a small rolling carry on say 21" or so. We will be taking special gloves, hats and camera equipment that I would not put in my checked luggage. Has any one taken a small rolling carry on without any problems. Any suggestions or advice would certainly be appreciated.