The rack I used was this one <http://www.rivbike.com/webalog/baggage_racks/20094.html> from Rivendell made by Nitto. It bolted on with very little bending/modifying. I attached my rear fender to it with zip ties and it all worked fine. At first I mounted the rack as low as possible thinking lower center of gravity was better but later I bent the horizontal rods upward which raised the rack and left a space between the fender and rack. In this space I attached my tent with a strap leaving more room in the daypack.

I rode the bike today after putting a different chainset on it and couldn't get the chain to come off even though I was trying. The problem was the Campy chainset.