Originally Posted by
cyclezealot
I think I found the perfect match for a 3-day credit card tour. That and a small backpack should do the trick.
. Light . It should hold at least 3 days worth of one's basic needs. It holds 28 liters of stuff and weights only 18 ounces.

You are planning on strapping the pack to the rack I hope? Backpacks are a pain in the back when you where them on the bike.