By double sided, I mean saddlebag, like those Axiom Appalachians. Arkel and Ortlieb are too pricey at the moment. I just realized that dis/mounting them in a hurry could be problematic. I want the quick on/off because I will be putting the bike on the front of the local bus. It is their policy that the bike be stripped of all loose items before it can be put on their rack.

I've got an old pair of Nashbar Townies, they are about 15 years old now, and there is no way I would trust putting putting the weight that I carry around on my back in one of those. But the idea of ziptying one appeals to me. Guess I need to start checking those things out. I wonder what the max load on one of those is? I know, probably varies by manufacturer...