I will be heading to Antarctica with National Geographic / Lindblad in December, has anyone done this trip? I am wondering about how strict they were with baggage on the Buenos Aires to Ushuaia charter flight. They told us 66lbs checked and 12lbs carry on (not including cameras). I am trying to stay within the limits but its tough. Anyone do this trip and have problems on that flight? I have no problem paying extra if i'm over, but im not sure if they will allow that or just tell me to leave some stuff behind.