I am going on an airplane trip. I can totally pack a road trip, but how do you pack one with the airline restrictions? I am unsure what I will have when I get there and what I will have access to, other than a fridge. I can pack salad dressings in my luggage, but how about lettuce and other cut up veggies? Do they freeze in the cargo hold? I can take them on board too…Please help me pack for success!