Well, sounds like we could get a little group outing organised! The destination for the ultimate Star Wars prop party! Pretty sure if we tell em we're all friends of Don Bies they'll let us in
Mike, I heard that Lucasfilm revamped their archive storage facilities at some point in the late nineties I think, updating them and carefully controlling temperature, humidity and so on. So I'd like to hope that gone are the days of items just left lying around on bare shelves!
... Off the Vader topic for a second, I read in an 'SW Insider' magazine years ago about a project to restore a lot of the original foam latex puppets and masks that had started to crumble. They showed Salacious Crumb getting fixed up, and ILMer Charlie Bailey removing water damage from a Star Destroyer model. This was just before a lot of items went on tour in Japan if I recall correctly.