I'm actually the current Greeks editor for the Wisconsin yearbook -- we have just about every single edition of the yearbooks at Wisconsin, dating back to 1885, in our office. I've had so much fun looking through them and seeing how Greek life has changed.
Something fun about the UW libraries website is that they have every yearbook up 'til 1977 scanned and online, so you can look through old yearbooks without even leaving your house:
http://digicoll.library.wisc.edu/cgi...e=UW.UWYEARBKS
GP -- a particular favorite of mine (and you might enjoy it too because you've been on the campus here enough) is the 1931 book's "the campus" section. See if you can recognize some of those places . . . . the UW campus used to be so much greener!
