Here are some of the national reports issued by the nations who have signed the Antarctic Treaty.
I began digging through the U.S. report and found a .pdf on tourism projects for 2008-2009. Lots of cruises.
This website consists of the U.S. Treary Inspection Report for 2006. Once every few years the U.S. travels the continent to investigate the other stations. Under the Antarctic Treaty, nothing is private in Antarctica, and all things are open to inspection.