does anybody have any good ideas for carrying more **** on my bike? here's the deal-- i'm heading to my parents' home for the holidaze. i've got a shoulderbag that will be packed to the max but i'd like to carry a bit more--after all i'll be at their house for a week. i have no racks and no bike-specific bags, and i don't want to leave my bike at my house. other than "wear half of what you're going to bring," does anybody have any clever ways of carrying a little bit more on their bike? i might wind up strapping this little knapsack i found in a closet to my bag, as i'm not sure if i can hang it from my bike in such a way that it won't hit any wheels. anyway, your strategies are desired.