How do you carry a backpack on a rear rack? I have a couple backpacks that I use regularly (North Face Surge II and Tamrac 759). Both are rather large and have lots of dangling straps.
I'm trying to figure out how to secure the backpack to a plain old rear rack without having it tip one way or the other, and without having the straps cause trouble. I'm thinking that I'll have to build some sort of tray-like base for the rack that is ample enough for the backpack, and that will contain the straps.
Any ideas appreciated