I am always amazed when I think of the logistics and costs of putting on a major DXpedition. When you couple that with remote and downright dangerous locations, we all owe a debt of gratitude to the teams that put them on.
It is a tribute to the skill of the operators that I was able to work VP6PJ on five bands and all three mode. I spent quite a bit of time listening on 15/12/10 and 160 meters, but never heard them (only wire antennas here).