The very last of what you said is most certainly the case. They weren't wearing any CBR gear, they were just flying in Helicopters bringing in supplies. They had to scrub the aircraft as well... But the levels of radiation weren't all that bad. But if all it takes is a quick wash to remove all/most then it would be dumb not to do it. People don't seem to understand that you get radiation doses by simply sunbathing...
Just broke my personal record for number of consecutive days without dying!