N773N is currently based out of Northwest Ohio.
According to the article linked to below, the aircraft was owned by Wally Fisck and based at Anoka County (Minnesota) airport prior to 2002.
Here is an article about the ferry flight that brought the aircraft to the Olympic Air Museum in Olympia, Washington in 2002:
http://www.aero-news.net/index.cfm?do=main.textpost&id=03ccd1da-952d-4c8e-9c2f-90930bc8c6bf
Here is a photo of the aircraft while it was at Olympic:
Here is 2865 at Oshkosh in 2008 in one of Bill’s classic display poses:
[ED – I had the opportunity to visit with Bill in June of 2013, here is a photo of 2865 in its airport hanger]