I might try the backpack idea. I was looking to get a large-ish daypack that keeps the frame off my back, anyway. I suppose that could work for cycling.

Just stumbled across some surprisingly large under-the-seat saddlebags (like Carradice) that do not require a rear rack. That might be a great option, assuming it clears my rear wheel.

For around-town, I'm going to mount a rear rack and maybe panniers on my beater bike, so that I can do errands carrying heavier stuff. I wish the beater bike was tour-worthy...

Mariposa