For those of you who have flown in the last whenever, I have a question. What size tote bag (purse) do you carry. Which pattern would you recommend? I'm going to take my small suitcase for clothes, etc, and store in the overhead. But I want a bag that will carry one change of underwear, my meds and some food. I'll be leaving at 6:30 in the morning and arriving at 4:30 in the afternoon.